/gal"euh siz'euhm/ , n.
1. a French idiom or expression used in another language, as Je ne sais quoi when used in English.
2. a feature that is characteristic of or peculiar to the French language.
3. a custom or trait considered to be characteristically French.
Also, gallicism .
[ 1650-60; gallicisme. See GALLIC, -ISM ]