Adjective: watertight 'wo-tu(r),tIt
- Not allowing water to pass in or out
"The submarine's watertight compartments prevented flooding in case of a breach"
- Without flaws or loopholes
"a watertight alibi";
- unassailable, unshakable, bulletproof, ironclad, unshakeable
See also: incontestable, incontestible, tight
Encyclopedia: Watertight