gaulish

noun

1. the extinct, Celtic language of ancient Gaul.

adjective

2. of or relating to ancient Gaul, its inhabitants, or their language.

noun

1. the extinct language of the pre-Roman Gauls, belonging to the Celtic branch of the Indo-European family

adjective

2. of or relating to ancient Gaul, the Gauls, or their language

1650s (adj.); 1660s (n.), from Gaul + -ish.