a. [AIR- 3.] So tight as to be impermeable to air.
[Not in Todd 1818.]
1760. J. Ferguson, Lect., vi. II. 194. Push the open end of the glass tube through the collar of leathers … which it fits so as to be air-tight.
1833. Brewster, Nat. Magic, xiii. 345. He was shut up in an air-tight breathing-box.
1857. Emerson, Poems, 86. You captives of your air-tight halls, Wear out in-doors your sickly days.
