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 gratu&imacron;tas, probably from Latin gratu&imacron;tus, voluntary; see gratuitous.