To call off something is to decide a planned event will not happen. Call off the search, call off the wedding, call off the strike.
It is used of things already arranged and under way, which is what separates it from cancel a booking. You can also call off a dog, which is where the picture comes from.
1phrasecall offTo decide a planned event will not happen.
“They will call off the search at nightfall if nothing is found.”
call off is a phrase.
Also accepted in games: cancel
Practised in Phrasal Verbs