Hypertext Webster Gateway: "watertight"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Water-tight \Wa"ter-tight`\, a.
So tight as to retain, or not to admit, water; not leaky.
From WordNet (r) 1.7 (wn)
watertight
adj 1: having no leaks [syn: {leakproof}]
2: not allowing water to pass in or out
3: without flaws or loopholes; "an ironclad contract"; "a
watertight alibi" [syn: {ironclad}, {unassailable}, {unshakable}]
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