To pinch, pluck, or twist sharply.(verb-transitive)
To adjust; fine-tune.(verb-transitive)
To make fun of; tease.(verb-transitive)
A sharp, twisting pinch.(noun)
A teasing remark or action; a joke.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "tweak" in a sentence
"Mr. Stringer said raising the tax rate to 4.332% from 3.876% for the wealthiest New Yorkers, a move he described as a "tweak," would allow for a "huge, meaningful" tax cut to 95% of the city."
"Creating camera-phone-friendly QR codes with a goo. gl shortlink URL tweak is nice, but one of our readers took the next logical step."
"Applying the tweak is simple enough — just download, extract and double-click on the registry hack file to apply the changes to the registry."