call in verb 6call-in noun 3call-in adjective 1forms 4 verb6 •To communicate with a base etc, by telephone.I was too unwell to work yesterday so I called in sick. •To report; communicate (a message) by telephone or similar.The hoaxer called in a bomb threat. •To summon someone, especially for help or advice.The government called in the army to deal with the riots. •To withdraw something from sale or circulation. •To request immediate repayment of (a debt). •To pay a short visit.I'll call in this afternoon to pick up my prescription. call-in noun3 •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. call-in adjective1 •In which members of the public telephone the studio and talk live to the presenter. formscalled in · calling in · calls in · call-ins