Take off

v. lift-off, leave the ground in flight; rise off the ground; remove (clothing); bring down; lessen; leave, depart; put an end to, execute

Takeoff is the phase of flight in which an aircraft goes through a transition from moving along the ground (taxiing) to flying in the air, usually on a runway. For balloons, helicopters and some specialized fixed-wing aircraft (VTOL aircraft such as the Harrier), no runway is needed. Takeoff is the opposite of landing.
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Verb
1. leave; "The family took off for Florida"
(synonym) depart, part, start, start out, set forth, set off, set out
(hypernym) leave, go forth, go away
(hyponym) lift off
(derivation) takeoff
2. take away or remove; "Take that weight off me!"
(hypernym) remove, take, take away, withdraw
(hyponym) undress, discase, uncase, unclothe, strip, strip down, disrobe, peel
3. depart from the ground; "The plane took off two hours late"
(synonym) lift off
(hypernym) depart, part, start, start out, set forth, set off, set out
(derivation) takeoff
4. take time off from work; stop working temporarily
(synonym) take time off
(hypernym) interrupt, disrupt, break up, cut off
5. mimic or imitate, especially in an amusing or satirical manner; "This song takes off from a famous aria"
(hypernym) imitate, copy, simulate
(derivation) parody, mockery, takeoff
6. remove clothes; "take off your shirt--it's very hot in here"
(hypernym) undress, discase, uncase, unclothe, strip, strip down, disrobe, peel
(hyponym) peel off
7. get started or set in motion, used figuratively; "the project took a long time to get off the ground"
(synonym) get off the ground
(hypernym) start, go, get going
8. prove fatal; "The disease took off"
(hypernym) kill
9. make a subtraction
(synonym) subtract, deduct
(hypernym) calculate, cipher, cypher, compute, work out, reckon, figure
(classification) arithmetic

(n.)
An imitation, especially in the way of caricature.
  

Term used to describe a sharp increase in the price of a stock, or a positive movement of the market as a whole.