"caller" in the noun sense
1. caller, company
a social or business visitor
"the room was a mess because he hadn't expected company"
an investor who buys a call option
the bettor in a card game who matches the bet and calls for a show of hands
4. caller, caller-out
a person who announces the changes of steps during a dance
"you need a fiddler and a caller for country dancing"
someone who proclaims or summons in a loud voice
"the callers were mothers summoning their children home for dinner"
the person who convenes a meeting
"who is the caller of this meeting?"
7. caller, caller-up, phoner, telephoner
the person initiating a telephone call
"there were so many callers that he finally disconnected the telephone"
"caller" in the adjective sense
"a cooling breeze"
"`caller' is a Scottish term as in `a caller breeze'"
Source: WordNet® (An amazing lexical database of English)
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