Third-person singular simple present indicative form of call

(idiomatic, transitive) To visit (a person); to pay a call to. / (idiomatic, transitive) To select (a student in a classroom, etc.) to provide an answer.

(obsolete) available when requested

(attributive) on call

Available to be summoned.

(intransitive, copulative) To communicate with a base etc, by telephone. / (transitive) To report; communicate (a message) by telephone or similar. / (intransitive) To pay a short visit.

(of a TV or radio programme) In which members of the public telephone the studio and talk live to the presenter.

A TV or radio programme allowing members of the public to telephone the studio and talk live to the presenter. / A telephone call of this kind. / A caller who makes such a call.

Third-person singular simple present indicative form of call in

simple past tense and past participle of call in