nonreturn

See also: non-return

English

Alternative forms

• non-return

Etymology

From non- +‎ return.

Noun

nonreturn (uncountable)

1. Absence of return; failure to come back or bring back.

Adjective

nonreturn (not comparable)

1. Allowing air or liquid to travel in one direction only, and not permitting its return. (of a valve)