1very thin, especially in a way that is unattractive:
Some supermodels are far too skinny.
2made withskimmed milk (=milk with all the fat and cream removed from it):
a skinny latte
➔ see usage notethin1WORD CHOICE: WORD CHOICE: thin, slim, skinny, slender, lean, slightThinis a general word meaning that someone has little fat on their body. It is usually, but not always, disapproving• He's much too thin. • Teenage girls all seem to want to be thin.Slimmeans thin in an attractive way• her lovely slim figureSkinnyis a fairly informal word meaning very thin, which is usually disapproving• ridiculously skinny modelsSlender, lean, and slight are used mostly in written English.Slendermeans thin in an attractive and graceful way• long slender legsLeanmeans thin and looking strong and fit• a tall, lean athleteSlightmeans thin and delicate-looking• Her brother was very slight and looked younger than he was. ➔ See alsothin
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.