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

CALLER is a 6 letter word that starts with C.

1. \Call"er\, n.
   One who calls.
   
   

2. \Cal"ler\, a. [Scot.]
   1. Cool; refreshing; fresh; as, a caller day; the caller air.
      --Jamieson.
   
   2. Fresh; in good condition; as, caller berrings.