from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A safety valve that relieves pressure when it becomes high but before it becomes dangerous.
from the GNU version of the Collaborative International Dictionary of English
- n. a valve arranged for relieving pressure of steam, gas, or liquid; an escape valve.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
Sorry, no etymologies found.