(sports) A ruling by an umpire, referee, or similar official during a sporting event, based on his or her perception of events and in the absence of any objective measurement.

(US) To make a telephone call in which the cost of the call is paid by the person receiving the call.

(idiomatic, performing arts) An audition which is open to the public and thus draws a large number of applicants, many of whom are inexperienced.

A box containing a telephone for use in emergency, usually mounted on a post in an area where normal access to telephones is inconvenient (such as on an interstate highway or a very long highway bridge)

Alternative spelling of call up

(US) When landing on a US aircraft carrier: to sight the lights from the multi-colored optical landing system that shows a pilot to be on the correct approach path or how to correct the approach path.

The moment at the end of a performance when actors come back on the stage and thank the audience for applauding them for their performance.

(finance) The option to call a securitized bond usually after a set time period or after the deal's assets have amortized substantially.

To conclude; to quit or stop an activity, especially after applying oneself to it for a significant period of time. / To declare debts resolved to one another

(politics) Such an event in a legislative body in order to determine if a quorum exists. / The time of day fixed for such an event.