noun
plural -offs
the moment when an airplane, helicopter, etc., leaves the ground and begins to fly [noncount]
[count] :the beginning of a jump
[count] :a sudden increase in size, activity, or popularity
[count] :a new or unusual way of making or doing something
[count] a performance in which someone copies the way another person speaks, moves, etc., in usually a humorous way
b chiefly US :a piece of writing, music, etc., that imitates the style of someone or something else in an amusing way :parody