air tightness

[air-tahyt]

air·tight

[air-tahyt]
adjective
1.
preventing the entrance or escape of air or gas.
2.
having no weak points or openings of which an opponent may take advantage: an airtight contract.

Origin:
1750–60; air1 + tight

air·tight·ly, adverb
air·tight·ness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Air tightness is always a great word to know.
So is callithumpian. Does it mean:
a fool or simpleton; ninny.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
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