1ADJ 不透水的;水密的 Something that is watertight does not allow water to pass through it, for example because it is tightly sealed. 不透水的;水密的
The flask is completely watertight, even when laid on its side.
即使平放,这个真空水杯也是滴水不漏。
The batteries are safely enclosed in a watertight compartment.
电池被安全地置于一个防水的隔间里。
SYN waterproof, hermetically sealed, sealed, water-resistant
2ADJ-GRADED (事实、论点或协议)严密的,无懈可击的 A watertight case, argument, or agreement is one that has been so carefully put together that nobody will be able to find a fault in it. (事实、论点或协议)严密的,无懈可击的
The police had a watertight case. They even got his fingerprints from that glass cabinet.