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caller (n.)a social or business visitor;
caller (n.)an investor who buys a call option;
caller (n.)the bettor in a card game who matches the bet and calls for a show of hands;
caller (n.)a person who announces the changes of steps during a dance;
you need a fiddler and a caller for country dancing
Synonyms: caller-out
caller (n.)someone who proclaims or summons in a loud voice;
the callers were mothers summoning their children home for dinner
caller (n.)the person who convenes a meeting;
who is the caller of this meeting?
caller (n.)the person initiating a telephone call;
there were so many callers that he finally disconnected the telephone
Synonyms: caller-up / phoner / telephoner