DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   caller
       adj 1: providing coolness; "a cooling breeze"; "`caller' is a
              Scottish term as in `a caller breeze'"
       2: fresh; "caller fish"
       n 1: a social or business visitor; "the room was a mess because
            he hadn't expected company" [syn: caller, company]
       2: an investor who buys a call option
       3: the bettor in a card game who matches the bet and calls for a
          show of hands
       4: a person who announces the changes of steps during a dance;
          "you need a fiddler and a caller for country dancing" [syn:
          caller, caller-out]
       5: someone who proclaims or summons in a loud voice; "the
          callers were mothers summoning their children home for
          dinner"
       6: the person who convenes a meeting; "who is the caller of this
          meeting?"
       7: the person initiating a telephone call; "there were so many
          callers that he finally disconnected the telephone" [syn:
          caller, caller-up, phoner, telephoner]