To call on , To call upon Meaning, Definition & Usage

Definitions
  1. (a) To make a short visit to; as, call on a friend. (b) To appeal to; to invite; to request earnestly; as, to call upon a person to make a speech. (c) To solicit payment, or make a demand, of a debt. (d) To invoke or play to; to worship; as, to call upon God.

Webster 1913