from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. So constructed or contrived as to prevent leaks or leakage.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Resistant to leaks; hermetic, sound; as of a dry cell battery.
from the GNU version of the Collaborative International Dictionary of English
- adj. having no leaks.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. not subject to leaks
leak + -proof (Wiktionary)