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The Collaborative International Dictionary of English v.0.48 (gcide)

Air-tight \Air"-tight`\, a.
1. So tight as to be impermeable to air or other gases; as,
an air-tight cylinder; -- said of containers.
[1913 Webster]

2. of such close construction as to have little leakage of
air in or out; -- said of structures
[WordNet 1.5]

3. so thoroughly convincing as to be insusceptible to doubt;
having no apparent counterarguments; -- of arguments or
assertions an airtight alibi an airtight argument

Syn: airtight, uncontradictable, undeniable.
[PJC]


Air-tight \Air"-tight`\, n.
A stove the draft of which can be almost entirely shut off.
[Colloq. U. S.]
[1913 Webster]