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.
An example of gratuity is a tip left for a server at a restaurant.
a sum of money, often a percentage of the total billed, given to a server, porter, etc. for a service or favor; tip
Origin of gratuityFrench gratuité from Medieval Latin gratuitas from Classical Latin gratuitus: see gratuitous
A favor or gift, usually in the form of money, given in return for service.
Origin of gratuityFrench gratuité from Old French gratuite from Medieval Latin grātuītās probably from Latin grātuītus voluntary ; see gratuitous .