'call off' definitions:

Definition of 'call off'

From: WordNet
verb
Postpone indefinitely or annul something that was scheduled; "Call off the engagement"; "cancel the dinner party"; "we had to scrub our vacation plans"; "scratch that meeting--the chair is ill" [syn: cancel, call off, scratch, scrub]
verb
Give the calls (to the dancers) for a square dance [syn: call, call off]

Synonyms of 'call off'

From: Moby Thesaurus