1.  takeoff(n = noun.act) - a departure; especially of airplanes;
is a kind of departure, going, going away, leaving
Derived form verb take off₁

2.  takeoff(n = noun.event) - the initial ascent of an airplane as it becomes airborne;
is a kind of ascension, ascent, rise, rising
Derived forms verb take off₁, verb take off₃

3.  takeoff(n = noun.communication) burlesque, charade, lampoon, mockery, parody, pasquinade, put-on, sendup, spoof, travesty - a composition that imitates or misrepresents somebody's style, usually in a humorous way;
is a kind of caricature, imitation, impersonation
Derived form verb take off₅

4.  takeoff(n = noun.act) mockery, parody - humorous or satirical mimicry;
is a kind of apery, mimicry
Derived form verb take off₅

1.  An imitation, especially in the way of caricature; -- used with of or on; as, the comedian did a hilarious takeoff on the president. [1913 Webster]

2.  The spot at which one takes off; specif., the place from which a jumper rises in leaping. [Webster 1913 Suppl.]
"The take-off should be selected with great care, and a pit of large dimensions provided on the landing side." [Webster 1913 Suppl.]

3.  The beginning of a leap from a surface or a flight into the air, especially the process or event of an airplane leaving the ground and beginning its flight; as, the takeoff of flight CA123 was scheduled for 3:00 PM. [PJC]

power takeoff, takeoff booster, takeoff rocket