Gratuity (noun)

A tip or gift given to someone in recognition of their services, usually in a service-oriented industry such as hospitality or transportation.

Origin:

Derived from the latin word "gratuitas" meaning "free gift".

Examples:

1. The waiter expected a gratuity for his excellent service, but the customers left without leaving a tip.
2. The gratuity system is an important part of the income for many service workers, who often earn low wages.
3. The gratuity amount is typically calculated as a percentage of the total bill or service charge.
4. In some cultures, it is customary to leave a larger gratuity for exceptional service.
5. Gratuities are usually given in cash, but can also be offered in the form of a gift or other form of recognition.