courtesy
Definitions
The showing of politeness in one's attitude and behavior toward others.
A polite speech or action, especially one required by social convention.
A favor or indulgence granted as a gesture of goodwill rather than as a right.
Examples
He held the door open as a common courtesy.
The airline offered us a free meal as a courtesy for the flight delay.
It is a basic courtesy to introduce yourself when meeting someone new.
Synonyms
politeness civility gallantry decorum gentleness thoughtfulness graciousness
Antonyms
rudeness impoliteness discourtesy insolence boorishness churlishness impertinence