Quick Answer
“Meantime” is a single word that means while something else is happening or during a waiting period. “Mean time” is a technical phrase used to describe an average (like in engineering or statistics). In everyday writing, “in the meantime” is almost always the correct and safest choice.
AI Overview Summary
- Meantime = everyday usage, means while waiting
- Mean time = technical term, means average duration
- Best default: use “in the meantime”
- Simple rule: waiting → meantime | average → mean time
Is It “Meantime” or “Mean Time”?
Here’s the thing… most people don’t actually need both.
Use “meantime” in almost all normal writing. Use “mean time” only when you’re talking about averages or technical measurements.
That’s it.
If you’re writing an email, a message, or even a blog post, “meantime” is the correct choice 99% of the time.
What Does “Meantime” Mean? (With Examples)
“Meantime” refers to the period between two events — usually when you’re waiting for something to happen.
Think of it like this:
Something is coming… but not yet. What happens during that gap? That’s the meantime.
Common Uses of Meantime
- Waiting for a reply
- Filling time between tasks
- Talking about temporary actions
Example Sentences
- I’ll send you the report tomorrow. In the meantime, review the draft.
- The movie starts at 8. In the meantime, let’s grab coffee.
- Your order is being processed. In the meantime, you can track it online.
Notice something? It always feels natural. That’s your clue you’re using it right.
What Does “Mean Time” Mean? (Technical Context Explained)
Now here’s where things shift.
“Mean time” is not about waiting. It’s about averages.
It’s used in technical fields like engineering, data analysis, and systems management.
Where “Mean Time” Is Used
- Mean Time Between Failures (MTBF)
- Mean Time To Repair (MTTR)
- Scientific or statistical calculations
Example Sentences
- The system has a mean time between failures of 500 hours.
- Engineers reduced the mean time to repair significantly.
Here’s what most people get wrong: They try to use “mean time” in normal sentences — and it instantly sounds off.
Meantime vs Mean Time (Side-by-Side Comparison)
The difference is simple: one is everyday language, the other is technical.
| Feature | Meantime | Mean Time |
|---|---|---|
| Meaning | While waiting | Average duration |
| Usage | Everyday English | Technical/engineering |
| Common Phrase | In the meantime | Mean time to repair |
| Safe for emails? | Yes | No |
If you’re not doing calculations, you probably don’t need “mean time.”
READ MORE >>> Pliers or Plyers? The Correct Spelling, Meaning, and When It Actually Matters
The 2-Second Decision Framework (Never Get It Wrong Again)
Let’s simplify this completely.
The Rule
- If it means waiting → use “meantime”
- If it means average → use “mean time”
That’s your shortcut.
How to Test It
Try replacing the word in your sentence:
- Replace with “while waiting” → if it fits, use meantime
- Replace with “average” → if it fits, use mean time
Example
“I’ll call you in the meantime.” → “I’ll call you while waiting.” ✅ Works
“I’ll call you in the mean time.” → “I’ll call you in the average.” ❌ Doesn’t make sense
This trick alone will save you from almost every mistake.
When Should You Use “In the Meantime”?
Use “in the meantime” whenever you’re talking about what happens while waiting for something else.
It’s one of the most common phrases in English.
Email and Workplace Examples
- I’ll confirm the schedule tomorrow. In the meantime, proceed with the plan.
- The client hasn’t responded yet. In the meantime, prepare a backup.
Academic and Formal Writing
- The results will be published next week. In the meantime, further analysis continues.
Here’s the key insight: “In the meantime” is safe, natural, and widely accepted everywhere.
Is “In the Mean Time” Ever Correct?
Short answer: almost never.
Technically, it can be correct in very specific contexts involving averages, but in real-world writing, it’s usually a mistake.
Most people who write:
“in the mean time”
actually mean:
“in the meantime”
So if you’re unsure, don’t risk it. Stick with “in the meantime.”
Common Mistakes and How to Fix Them
Most errors happen when people overthink and choose the wrong form.
Incorrect vs Correct Examples
| Incorrect | Correct |
|---|---|
| I’ll call you in the mean time | I’ll call you in the meantime |
| In the mean time, check this | In the meantime, check this |
| We’ll wait, mean time do this | We’ll wait, meantime do this |
Pattern: If it’s everyday language → it should almost always be meantime.
Real-World Mini Case Study
Let’s make this real.
Scenario: Job Email
Incorrect Version: “I’ll review your application tomorrow. In the mean time, feel free to ask questions.”
At first glance, it seems fine. But to a trained reader, it feels slightly off — almost careless.
Correct Version: “I’ll review your application tomorrow. In the meantime, feel free to ask questions.”
Clean. Natural. Professional.
Why This Matters
Small grammar choices send signals.
- Correct usage → confidence + clarity
- Incorrect usage → subtle doubt
Most people won’t call it out… But they’ll notice.
Meantime vs Meanwhile vs Other Confusing Pairs
“Meanwhile” is similar to “meantime,” but not identical.
Quick Comparison
| Word | Meaning |
|---|---|
| Meantime | During a waiting period |
| Meanwhile | At the same time (parallel actions) |
Example
- Meantime: I’ll cook dinner. In the meantime, set the table.
- Meanwhile: She was cooking. Meanwhile, he was cleaning.
Other Common Confusions
- Anytime vs Any time
- Everyday vs Every day
Here’s the pattern: English often combines words when they become common expressions. “Meantime” follows that same logic.
Expert Tips to Avoid Grammar Confusion
Let’s make this effortless for you.
Tip 1: Use the Default Rule
If you’re unsure → use “meantime”
Tip 2: Avoid Overthinking
Most people make mistakes because they try to sound “more correct.” Ironically, that’s what causes the error.
Tip 3: Remember This Shortcut
MEAN = average → math → mean time
Everything else? Meantime.
Tip 4: Stick to “In the Meantime”
This phrase is your safety net. It works in emails, essays, and conversations.
FAQs
“Meantime” is one word in standard English and is the correct form in everyday usage.
“Meantime” refers to a waiting period, while “meanwhile” describes two actions happening at the same time.
No, “mean time” is mainly used in technical or statistical contexts, not casual or professional writing.
Yes, in most cases it is incorrect and should be replaced with “in the meantime.”
“In the meantime” is the safest and most widely accepted phrase in professional communication.
Final Thoughts
Most grammar rules feel complicated. This one isn’t.
Here’s the truth: You don’t need to memorize definitions — you just need a simple decision rule.
If you’re talking about waiting, use meantime. If you’re talking about averages, use mean time.
And when in doubt? “In the meantime” will almost never fail you.
That’s the kind of rule you can trust — not just for exams or writing, but for real-life communication where clarity actually matters.