We found 18 dictionaries that define the word relief valve:

General (13 matching dictionaries)

1. relief valve: Merriam-Webster
2. relief valve: Collins English Dictionary
3. relief valve: Vocabulary.com
4. relief-valve, relief valve: Wordnik
5. relief valve: Wiktionary
6. relief valve: The Wordsmyth English Dictionary-Thesaurus
7. relief valve: Infoplease Dictionary
8. Relief valve, relief valve: Dictionary.com
9. Relief valve: Wikipedia, the Free Encyclopedia
10. relief valve: Rhymezone
11. relief valve: FreeDictionary.org
12. relief valve: Mnemonic Dictionary
13. relief valve: TheFreeDictionary.com

Business (1 matching dictionary)

14. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

15. relief valve: Encyclopedia

Tech (3 matching dictionaries)

16. AUTOMOTIVE TERMS (No longer online)
17. Relief valve: Construction Glossary
18. RELIEF VALVE, VALVE, RELIEF: Power Engineering

(Note: See relief_valves as well.)

Definitions from Wiktionary (relief valve) ▸ noun:  Synonym of safety valve Similar: safety valve, escape valve, escape, escape cock, suction valve, expansion vessel, lockshield, vacuum valve, safety tube, vapor lock, more... Opposite: inlet valve, intake valve, suction valve Phrases: pressure relief valve, safety relief valve, Pilot-operated relief valve, more... ▸ Words similar to relief valve ▸ Usage examples for relief valve ▸ Idioms related to relief valve ▸ Wikipedia articles (New!) ▸ Words that often appear near relief valve ▸ Rhymes of relief valve ▸ Invented words related to relief valve