- too tight for air or gas to enter or escape
- having no flaws or weaknesses: an airtight alibi
- giving no opening for attack; invulnerable: an airtight defense
- Impermeable by air.
- Having no weak points; sound: an airtight excuse.
(comparative more airtight, superlative most airtight)
(comparative more air-tight, superlative most air-tight)
- Alternative form of airtight.