adj.
Pronunciation: ' er- ˌ t ī t
Function: adjective
Date: 1760
1 : impermeable to air or nearly so <an airtight seal>
2 a : having no noticeable weakness, flaw, or loophole <an airtight argument> b : permitting no opportunity for an opponent to score <an airtight defense>
– air · tight · ness noun