tweak Definition in Cambridge British English Dictionary
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Definition of "tweak" - British English Dictionary

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tweakverb [T]

uk   us   /twiːk/

tweak verb [T] (PULL)

to pull and twist something with a small sudden movement: Standing in front of the mirror she tweaked a strand of hair into place.

tweak verb [T] (CHANGE SLIGHTLY)

to change something slightly, especially in order to make it more correct, effective, or suitable: The software is pretty much there - it just needs a little tweaking. You just need to tweak the last paragraph and then it's done.
tweak
noun [C] uk   us  
He gave the boy's nose a tweak.
(Definition of tweak from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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