A surname.

(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.

Initialism of computer-assisted language learning.

(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.

To shout out in order to summon (a person). / To ask for in a loud voice. / (figuratively) To request, demand. / To necessitate, demand. / To stop at a place and ask for (someone).

(intransitive) To request, summon, or beckon. / (intransitive) To cry or shout. / (transitive) To utter in a loud or distinct voice. / (transitive, intransitive) To contact by telephone.