definition of
tweak

[1] #1 tweak n. [pinch] a squeeze with the fingers. wn

[2] #2 tweak v. pinch or squeeze sharply. wn

[3] #3 tweak v. [pluck, pull off, pick off] pull or pull out sharply; "pluck the flowers off the bush". wn

[4] #4 tweak v. [fine-tune] adjust finely; "fine-tune the engine". wn