The definition of gratuity is a sum of money given to someone who provides service or a favor as a way to show graciousness or thankfulness.
(noun)An example of gratuity is a tip left for a server at a restaurant.
See gratuity in Webster's New World College Dictionary
noun pl. gratuities
Origin: Fr gratuité < ML gratuitas < L gratuitus: see gratuitous
See gratuity in American Heritage Dictionary 4
noun pl. gra·tu·i·ties
Origin:
Origin: French gratuité
Origin: , from Old French gratuite
Origin: , from Medieval Latin grātuītās
Origin: , probably from Latin grātuītus, voluntary; see gratuitous
.Learn more about gratuity