1.
( of an aircraft, etc. ) to leave the ground and begin to fly :
The plane took off an hour late.
—related noun take-off
OPP land
2.
( informal ) to leave a place, especially in a hurry :
When he saw me coming he took off in the opposite direction.
3.
( of an idea, a product, etc. ) to become successful or popular very quickly or suddenly :
The new magazine has really taken off.