nouns
a social or business visitor
"the room was a mess because he hadn't expected company"
an investor who buys a call option
is a type of (narrower)
someone who commits capital in order to gain financial returns
the bettor in a card game who matches the bet and calls for a show of hands
is a type of (narrower)
someone who bets
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"
is a type of (narrower)
someone who proclaims a message publicly
the person who convenes a meeting
"who is the caller of this meeting?"
is a type of (narrower)
a person who rules or guides or inspires others
the person initiating a telephone call
"there were so many callers that he finally disconnected the telephone"