Definition of "callout"

(communication) An outgoing telephone call.  examples

An instance of being summoned to visit a certain place in order to provide assistance; an instance of summoning someone who is on call.  examples

(US) A meeting or rally held in order to find interested participants, e.g. for an activity or sports team.  examples

(slang) An invitation to fight.

A request for people to join or take part.  quotations  examples

(typography, graphic layout) A pull quote: an excerpt from an article (such as in a news magazine) that is duplicated in a large font alongside the article so as to grab a reader's attention and indicate the article's topic.  quotations  examples

An annotation that pertains to a specific location in a body of text or a graphic, and that is visually linked to that location by a mark or a matching pair of marks.  examples

The act of calling out from work, i.e. announcing that one cannot attend; the act of calling in sick.  quotations  examples

(idiomatic) A form of verbal abuse with the intention to make the victim feel guilty.  examples