noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An opening, possibly covered by a grate or grill, possibly ducted, that allows air to circulate.
2. 2
   A device or valve that allows to air to be evacuated from a radiator or pipe in a heating system.

Synonyms

All synonyms

bleederexhaust ventventventholeventilationventilator