To enhance in appearance by adding decorative touches; embellish: a coat that was garnished with a fur collar. To decorate (prepared food or drink) with small colorful or savory items: garnished the potatoes with parsley. Law To garnishee. Ornamentation; embellishment. An embellishment added to a prepared food or drink for decoration or added flavor. Slang An unwarranted fee, such as one extorted from a new prisoner by a jailer.