1. A game played on a rectangular table with small ivory balls, which the players aim to drive into pockets, at the sides and corners of the tables, by impelling one ball against another with maces or cues.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• pillards,
• ballards,
• billards,
• biliard,
• bilboards,
• billians,
• billbords,
• billiasrds,
• villiards,
• nilliards,
• hilliards,
• billiareds,
• billiardes,
• biliards,
• lilliales,
• villards,
• biliardes,
• billiardses,
• bilards,
• bilierds

• billiard,
• billiardist.

The adjective form of the word "billiards" is "billiard".