Ky is very loyal, trustworthy Ky is the type of guy girls fall in love with over his sweet kind aroma. British Dictionary definitions for KY (3 of 3) · KY · abbreviation for · Do Not Sell My Personal Information · Manage Consent Preferences · Performance Cookies. Ky definition: Cayman Islands | Meaning, pronunciation, translations and examples. What does KY mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: KY. Kentucky's northern border is formed by the Ohio River and its western border by the Mississippi River; however, the official border is based on the courses of the.