We found 5 dictionaries that define the word relief valves:

General (4 matching dictionaries)

1. relief valves: Merriam-Webster
2. relief valves: Collins English Dictionary
3. relief valves: Vocabulary.com
4. relief valves: Wiktionary

Computing (1 matching dictionary)

5. Relief valves: Encyclopedia

(Note: See relief_valve as well.)

Definitions from Wiktionary (relief valve) ▸ noun:  Synonym of safety valve ▸ Also see relief_valve ▸ Words similar to relief valves ▸ Usage examples for relief valves ▸ Idioms related to relief valves ▸ Wikipedia articles (New!) ▸ Words that often appear near relief valves ▸ Rhymes of relief valves ▸ Invented words related to relief valves