air-tight

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Definitions from WordNet

Adjective air-tight has 2 senses

airtight, air-tight - having no weak points; "an airtight defense"; "an airtight argument"
Antonym: vulnerable (indirect, via invulnerable)
airtight, air-tight, gas-tight - not allowing air or gas to pass in or out
Antonym: leaky (indirect, via tight)

Definitions from the Web

Air-tight

Adjective:

1. (of a container or closure) Designed to prevent the passage of air or gas in or out.

Example sentence: The air-tight container kept the cookies fresh for weeks.

2. (of an argument or case) Incapable of being disputed or questioned; unassailable.

Example sentence: The lawyer presented an air-tight case that left no room for doubt.

Noun:

1. A container, closure, or seal that is designed to be air-tight.

Example sentence: The kitchen store sells a variety of air-tights for food storage purposes.

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