Wiktionary
a. 1 (context US English) Serving liquor, not only beer and wine (qualifier: of a bar or restaurant). 2 (context catering English) Provisioned with standard liquors (vodka, gin, whisky, rum, tequila), together with mixers, but of a middle (inoffensive but inexpensive) grade. Contrasted with premium bar and super-premium bar, which carry higher grades of liquor.
Usage examples of "full bar".
Impatient, he expertly worked the console until he had initiated a transfer of twenty strips of gold-pressed latinum--a full bar--from one of his accounts on Bajor directly into Zhrel's holdings on Ferenginar.
A good hunting lodge, full bar, nice bedrooms, a freezer for venison.
Roarke moved to a polished cabinet, and opened it to reveal a full bar.
There they purchased from other night gunners enough additional ducks to make full bar.
It sported a full bar complete with bartender, a couple of Olympic-size sofas, and a desk you could've played tennis on.
The Ferengi slapped a full bar of latinurn on the table and drew himself a huge pile of black, silver, and yellow chips.