Many English learners and even native speakers often get confused between “mean time” and “meantime.” At first glance, they seem similar, but their meanings and usages are quite different. This confusion can lead to sentences that sound awkward or even incorrect, especially in formal writing.
Understanding the distinction is important for both UK and US English, as subtle variations in spelling, usage, or context can affect clarity. While Americans and British speakers mostly use “meantime” in similar ways, “mean time” is often misused or misinterpreted.
Whether you’re writing emails, essays, or casual messages, knowing the correct form helps you communicate more clearly and confidently. In this guide, we will break down everything you need to know about mean time vs meantime, including definitions, examples, common mistakes, and tips to remember the correct usage.
Quick Answer
The short and simple answer is:
- “Meantime” (one word) is the correct form when referring to the period between two events, for example: “In the meantime, we can start preparing the materials.”
- “Mean time” (two words) technically refers to mathematical or technical averages of time, such as in astronomy (mean solar time). However, in everyday English, using “mean time” to mean “meantime” is incorrect.
So, if you’re talking about something happening while waiting for another event, always use meantime.
Meaning of the Correct Form: “Meantime”
Definition:
“Meantime” is a noun or adverb meaning “the period between two events” or “in the meantime”.
Usage Examples in US & UK English:
- US English:
- “I’ll start cooking dinner. In the meantime, you can set the table.”
- “The new software won’t be ready until Monday. Meantime, let’s use the old version.”
- UK English:
- “She will arrive at 5 PM. In the meantime, we can finish the paperwork.”
- “The museum opens next week. Meantime, the staff are training new volunteers.”
Notes:
- Meantime is versatile. You can use it alone or with “in the,” but “in the meantime” is the more common conversational form.
- It is widely accepted in both British and American English with the same meaning.
Meaning of the Incorrect Form: “Mean Time”
Definition:
“Mean time” (two words) is not the same as “meantime.” In technical contexts, it refers to an average or standard measurement of time, such as:
- Mean solar time – the average time calculated based on the Sun’s position.
- Mean time between failures (MTBF) – used in engineering and reliability statistics.
Common Mistakes:
- Writing: “I’ll do my homework, and in the mean time, you can watch TV.”
- Corrected: “I’ll do my homework, and in the meantime, you can watch TV.”
Summary:
Unless you are discussing scientific or technical time calculations, avoid using “mean time” in casual or formal writing.
Keyword Comparison / Key Differences
| Feature | Meantime | Mean Time |
| Meaning | Period between two events | Average or technical time |
| Spelling | One word | Two words |
| Common usage | Everyday English | Technical, scientific contexts |
| Example (US) | “In the meantime, let’s start without them.” | “The MTBF (mean time between failures) is 5 years.” |
| Example (UK) | “Meantime, she continued working on her project.” | “Mean time is calculated using astronomical tables.” |
| Tone | Informal & formal | Technical & formal |
| Mistake risk | Low when used correctly | High if misused in everyday writing |
Key Takeaway: Use meantime for general English and mean time only in technical fields.
Meantime or Mean Time
| Aspect | Information |
|---|---|
| Meaning | Meantime is an adverb or noun that means during the period between two events. Mean time is a less common phrase usually used in technical, scientific, or statistical contexts to refer to an average time measurement. |
| Usage | In everyday English, meantime is almost always the correct choice. |
| Example | The report will be ready tomorrow. In the meantime, you can review the draft. |
| Grammar Tip | Use meantime as one word when referring to an interval between events. Use mean time only when discussing an average or calculated time. |
Mean Time or Meantime Synonym
| Word/Phrase | Similar Meaning |
|---|---|
| Meanwhile | During the same period |
| In the interim | In the period between events |
| For now | Temporarily |
| Until then | Before a future event happens |
| During this time | While waiting |
| Interim period | Temporary period between events |
Mean Time or Meantime Examples
| Correct Usage | Explanation |
|---|---|
| The repairs will take a week. In the meantime, use the back entrance. | Refers to the period while waiting. |
| She is finishing her degree. In the meantime, she works part-time. | Shows an action happening during an interval. |
| Scientists calculated the mean time between equipment failures. | Uses mean time as an average measurement. |
| The flight was delayed. In the meantime, passengers waited in the lounge. | Indicates what happened during the waiting period. |
Mean Time or Meantime Grammar
| Grammar Rule | Explanation |
|---|---|
| Meantime (one word) | Functions as a noun or adverb meaning “during the interval.” |
| Mean Time (two words) | Functions as a noun phrase referring to an average amount of time. |
| Common Expression | In the meantime is the most common and grammatically correct phrase in everyday English. |
| Formal Writing | Both forms are correct when used in their proper contexts. |
| Common Mistake | Writing mean time instead of meantime when referring to a waiting period. |
| Quick Comparison | Meantime | Mean Time |
|---|---|---|
| Everyday English | ✅ Common | ❌ Rare |
| Means “during the interval” | ✅ Yes | ❌ No |
| Means “average time” | ❌ No | ✅ Yes |
| Example | In the meantime, I’ll call you. | The mean time to repair was 3 hours. |
Common Mistakes People Make
Even experienced writers often make these mistakes:
- Splitting Meantime incorrectly:
- ❌ “In the mean time, I will read a book.”
- ✅ “In the meantime, I will read a book.”
- Using Mean Time for casual contexts:
- ❌ “The meeting is delayed. Mean time, let’s check emails.”
- ✅ “The meeting is delayed. Meantime, let’s check emails.”
- Confusing US vs UK conventions:
- Both US and UK English use “meantime” the same way.
- British writers may prefer slightly more formal phrasing: “In the meantime, we shall continue our work.”
- Overusing “in the meantime”:
- Avoid redundancy: “Meanwhile, in the meantime” is unnecessary.
Meantime vs Mean Time
Meantime and mean time may look similar, but they have different meanings and uses. Meantime is an adverb or noun that means during the intervening period or while something else is happening. For example: The repairs will take a week. In the meantime, we can work from home. On the other hand, mean time is a technical term that refers to an average amount of time, often used in science, engineering, and statistics, such as mean time between failures (MTBF). Using the correct form depends on whether you are talking about a waiting period or an average measurement of time.
Correct Usage in Sentences
Here are practical examples you can use in writing or speech:
US English Examples
- “The flight is delayed. In the meantime, we can grab a coffee.”
- “The website update will take a few hours. Meantime, check the old portal for information.”
- “She is out of town. In the meantime, we will continue the project without her.”
- “The computer is being repaired. Meantime, I’ll work on my paperwork.”
- “The new policy isn’t effective yet. In the meantime, employees should follow the old rules.”
UK English Examples
- “The train will depart at 7 PM. In the meantime, let’s visit the café.”
- “He hasn’t replied yet. Meantime, we should prepare the documents.”
- “The council will release the report next week. In the meantime, residents can attend workshops.”
- “The exhibition opens next Monday. Meantime, volunteers are setting up the displays.”
- “The play starts at 8 PM. In the meantime, enjoy a drink in the foyer.”
Tips to Remember the Correct Usage
- Mnemonic Trick: Think “mean” = average, technical. “Meantime” = waiting period.
- Check context:
- Waiting between events → meantime
- Technical calculation → mean time
- Single word rule: Everyday English usually merges it into meantime.
- Use “in the meantime” if unsure it’s always safe.
Extra Tip: When writing formally, avoid “mean time” unless discussing technical matters like MTBF or astronomy.
FAQs: Mean Time or Meantime
Q1: Can I use “mean time” instead of “meantime” in a sentence?
A: No, in everyday English, use meantime. “Mean time” is reserved for technical or scientific contexts.
Q2: Is “in the meantime” more common than “meantime”?
A: Yes, especially in conversational English, both in the US and UK.
Q3: Are there UK vs US differences in using “meantime”?
A: Very minimal. Usage is almost identical; British English may appear slightly more formal.
Q4: Can “mean time” ever be used in normal writing?
A: Only when discussing averages, astronomy, or reliability statistics. Otherwise, it’s incorrect.
Q5: How do I remember the difference easily?
A: Associate mean with technical or numerical contexts. Associate meantime with waiting periods or transitions.
Q6: Is “meantime” informal?
A: Not really. It’s acceptable in both casual and formal writing.
Q7: Can “meantime” be used at the start of a sentence?
A: Yes. Example: “Meantime, the team continued with preparations.”
Conclusion
Understanding the difference between mean time and meantime is simple once you know the rules:
- Meantime → everyday English, the period between two events.
- Mean time → technical/scientific average of time.
By remembering the context and using in the meantime when in doubt, you can confidently write for both UK and US audiences. Avoid common mistakes, use clear examples, and practice forming sentences with “meantime.”
Start using meantime today in your emails, reports, and conversations to sound professional and accurate. Don’t let small confusions like this hold back your fluency in English.
I’m Henry Collins, a passionate grammar enthusiast who loves making English simple and clear for everyone. I enjoy breaking down tricky grammar rules into easy, everyday language. Through my writing, I aim to help learners build confidence and write with accuracy. My goal is to turn confusion into clarity one word at a time.
