noun

1. Polite behavior.

   “He was always known for his grace, kindness, and courtesy to people of every rank.”

2. A polite gesture or remark, especially as opposed to an obligation or standard practice.

   “I offered them a ride simply as a courtesy.”

3. Consent or agreement in spite of fact; indulgence.

   “They call this pond a lake by courtesy only.”

adjective

1. Given or done as a polite gesture.

   “We paid a courtesy visit to the new neighbors.”

2. Supplied free of charge.

   “The event planners offered courtesy tickets for the reporters.”

Synonyms: complimentary, free of charge, gratis

verb

1. To make a curtsey.

   “The hotel's staff variously curtsied, nodded, and bowed to the owner as she passed.”