Definitions of call
to announce formally that an event (often a meeting) is going to happen
The board of directors called for a meeting of the shareholders.
to ask for something formally, such as payment of a debt, a vote on a particular matter or for an election to be held etc
An election was called following his resignation.
to ask or tell someone formally to come to a court of law, usually to give evidence, or to come to the witness stand in a court of law; to ask or tell someone formally to come to a particular place
The prosecutor called several witnesses who had seen the crime.