Used attributively (e.g., courtesy call, courtesy bus); denotes something provided free of charge or out of politeness/respect.
Translations
gratuitPour un service fourni sans frais. The airport offers a courtesy shuttle for all passengers.
L’aéroport propose une navette gratuite pour tous les passagers.
honorifiquePour un titre ou un usage accordé par marque de respect plutôt que par droit. Provided free of charge as a gesture of goodwill or politeness. The airport offers a courtesy shuttle for all passengers.
Given or done as a mark of respect rather than by entitlement. She held the courtesy title of "Lady" after her marriage.