(poker) To call a raise, as opposed to folding or reraising, often to disguise the strength of one's hand.

Use a telephone to request the arrival of a police officer.

Use a telephone to ensure arrival of an ambulance

(broadcasting) Call sign.

(US, military) A daily lineup of military personnel requiring medical attention.

(figuratively) Appeal, urgent call to action.

plural of call graph

(computing) A directed graph that represents relationships between called and calling subroutines in a computer program, used in code analysis.

simple past tense and past participle of flat call

present participle of flat call