—n. 1. a cut and polished precious stone or pearl fine enough for use in jewelry.
2. something likened to or prized as such a stone because of its beauty or worth: His painting was the gem of the collection. 3. a person held in great esteem or affection.
4. muffin (def. 1).
5. Print. Brit.a 4-point type of a size between brilliant and diamond.
—v.t. to adorn with or as with gems; begem.
—adj. Jewelry.noting perfection or very high quality: gem color; a gem ruby.