Airtight means completely sealed so that air cannot get in or out. It can also mean something is very well planned or very solid, with no weak points.
People use airtight in everyday life to talk about containers, windows, doors, or packaging that keep air out. They also use it for plans, arguments, or explanations that are so strong and clear that nothing can be easily challenged.
Meaning & Usage
In a physical sense, airtight describes something that is tightly closed and sealed. For example, an airtight jar keeps food fresh. In a broader sense, an airtight case or plan is one that is complete and hard to question.
Examples
The food stayed fresh because it was stored in an airtight container.
Her argument was airtight, so no one could find a flaw in it.
Make sure the windows are airtight before winter starts.
What does airtight mean in a simple way?
It means sealed so air cannot pass through, or something that is very strong and has no obvious flaws.
Can airtight be used for ideas or plans?
Yes. People often say a plan, reason, or argument is airtight when it is very solid and convincing.
What is an example of airtight in daily life?
An airtight lunch box keeps snacks fresh by stopping air from getting in.
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