An open and/or public audition, especially for actors and actresses.

(programming) Alternative form of call-by-reference

(programming) Alternative form of call-by-value

plural of ghost call

(telephony) A telephone call for which, when the recipient of the call answers, there is no one on the other end.

plural of port of call

Synonym of voice in the wilderness

A high-pitched call made by birds to warn of the presence or approach of a predator.

Alternative form of call on (certain senses).

(singing) A musical technique in which one or more performers calls and others (often the audience) respond with alternating musical phrases.