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

(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.

(singing) A musical technique in which one or more performers calls and others (often the audience) respond with alternating musical phrases.

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

An order to report for military service.

(transitive) To retrieve from personal or computer memory. / (transitive) To summon (someone) to report for military service. / (transitive) To select e.g. to a sports squad.

plural of call sign

A situation in which an injury or other undesirable outcome is narrowly avoided. / A close brush with nuclear war.

(chiefly US) To make the decisions; to be in charge; to give orders.