nonreturn
Allowing air or liquid to travel in one direction only, and not permitting its returnAllowing air or liquid to travel in one direction only, and not permitting its return. (of a valve)
Meaning
1 senses(not comparable)Allowing air or liquid to travel in one direction only, and not permitting its return. (of a valve)
Origin
From non- + return.From non- + return.
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