Have you ever had to change plans at the last minute? Perhaps you’ve cancelled a picnic because of rain or decided not to watch a movie after all. These moments are perfect for using “call off”.
“Call off” is a phrasal verb. It means to cancel something that was planned.
We use it when something will not happen anymore.
It is often used for events like:
a party
a meeting
an investigation
a game
Usually, someone decides to stop the event before it starts.

Examples of Call Off
Weather example:
We called off the picnic because it started to rain.
(This means we canceled the picnic because of the rain.)
Business example:
The company called off the deal because they did not agree about money.
(This means they stopped the business talks.)
Emergency example:
The search was called off when they found the missing woman.
(This means they stopped looking for her because she was safe.)
Social example:
I called off dinner with my friends because I felt sick.
(This means I canceled my plans because I wasn’t feeling well.)