compound noun a whole formed by a union of two or more elements or parts compound, chemical compound noun (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight compound adjective an enclosure of residences and other building (especially in the Orient) compound adjective
compound. 1) In chemistry, a compound is a substance that results from a combination of two or more different chemical element s, in such a way that the atom s of the different elements are held together by chemical bonds that are difficult to break. These bonds form as a result of the sharing or exchange of electron s among the atoms.
