An example of courteous is someone letting a pregnant woman go ahead of them in line for the restroom.
Origin of courteousMiddle English courteis ; from Old French corteis ; from court: see court and amp; -eous
Origin of courteousMiddle English corteis, courtly, from Old French, from cort, court; see court.
(comparative more courteous, superlative most courteous)
From Old French curteis (French courtois), from cort (“court”), displaced native Old English hende (“courteous, gracious, friendly”).