Search Result for "watertight": 
Wordnet 3.0

ADJECTIVE (2)

1. not allowing water to pass in or out;

2. without flaws or loopholes;
- Example: "an ironclad contract"
- Example: "a watertight alibi"
- Example: "a bulletproof argument"
[syn: unassailable, unshakable, watertight, bulletproof]



The Collaborative International Dictionary of English v.0.48:

Water-tight \Wa"ter-tight`\, a.
   So tight as to retain, or not to admit, water; not leaky.
   [1913 Webster]


WordNet (r) 3.0 (2006):

watertight
    adj 1: not allowing water to pass in or out
    2: without flaws or loopholes; "an ironclad contract"; "a
       watertight alibi"; "a bulletproof argument" [syn:
       unassailable, unshakable, watertight, bulletproof]