Simple Definition of gratuity
: an amount of money given to a person (such as a waiter or waitress) who has performed a service
: an amount of money given to a retiring soldier or employee
Full Definition of gratuity
: something given voluntarily or beyond obligation usually for some service; especially : tip
Examples of gratuity in a sentence
A 15 percent gratuity is automatically added to the restaurant bill.
<for parties of eight or more, we automatically add a 15% gratuity onto the bill>
First Known Use of gratuity
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