Meaning of “take off” - Learner’s Dictionary

take off

phrasal verb with take uk us /teɪk/ verb [ T ] (past tense took, past participle taken)
AIRCRAFT

A2 If an aircraft takes off, it begins to fly.

SUCCESSFUL

B2 to suddenly become successful:

Her career had just taken off.
LEAVE

to suddenly leave without telling anyone where you are going:

He took off in the middle of the night.

(Definition of “take off phrasal verb, verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)