0 If an aircraft, bird, or insect takes off, it leaves the ground and begins to fly:
The plane took off at 8.30 a.m.
1 to suddenly start to be successful or popular:
2 to suddenly leave somewhere, usually without telling anyone that you are going:
3 the moment when an aircraft leaves the ground and begins to fly:
4 a piece of acting or writing, etc. that copies the way a particular person speaks or behaves, or the way something is done, usually to entertain other people:
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.