Meaning

adjective lacking refinement or cultivation or taste

adjective of or associated with the great masses of people

adjective being or characteristic of or appropriate to everyday language

originFrom Middle English vulgare, from Latin vulgāris, from volgus, vulgus (“mob; common folk”), from Proto-Indo-European *welH-. Compare Welsh gwala (“plenty, sufficiency”), Ancient Greek ἁλία (halía, “assembly”), εἰλέω (eiléō, “to compress”), Old Church Slavonic великъ (velikŭ, “great”).

Etymology from Wiktionary, CC BY-SA 3.0