A favor or gift, usually in the form of money, given in return for service.(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 "gratuity" in a sentence
"If you feel like we did a good job AT LEAST let us know, and gratuity is nice too."
"# Prior to this bill, the family of a US troop killed in action would only receive a $12,000 death gratuity from the government."
"For indeed, the egoistic and vain gratuity of what some people call "art for art's sake" has been so reviled that it is no small recompense for me to see my writings, which have had no greater ambition than to raise themselves to that level, ranked among the instruments of revolutionary and upsetting action."