Cold temperatures of approximately zero degrees. / The property of a casting having no chill (hardened surface). / (informal) Lack of any good qualities.

(Singapore, usually military) A person who is unable to perform a single pull-up or chin-up.

plural of zero fighter

plural of ground zero

(US, politics, historical) A 1980s plan whereby all Soviet and American nuclear weapons would be mutually withdrawn from Europe.

(of cattle) Kept in enclosures and never let out to graze.

(education) A high school class that is offered early in the morning, before the scheduled start of the school day.

The point, during childbirth, at which the baby's head is level with the ischial spines in the maternal pelvis.

(grammar) The absence of an ending after a noun‐stem in a language in which endings are normally applied; often written as ∅

zero gravity