(transitive, intransitive) To make or become waste (i.e. barren, dejected, dismal, feeble, or sickly) or wasted

(mechanical engineering, automotive, aviation) A valve that allows exhaust gases to bypass an engine's turbocharger, in order to keep from overspeeding the turbocharger rotor or driving the boost pressure high enough to risk engine knocking or detonation.

plural of wastegate

A wastebasket; a bin used for household or office waste.

plural of time-waster

plural of wastebin

(card games) The discard pile; the area where the cards from the stock go when they are brought into play.

plural of wastepile

(slang) Someone who is habitually wasted (drunk or stoned)

(obsolete) wasteful