Compound1  —n. 1 mixture of two or more things. 2 word made up of two or more existing words. 3 substance formed from two or more elements chemically united in fixed proportions. —adj. 1 made up of two or more ingredients or parts. 2 combined; collective. —v. 1 mix or combine (ingredients or elements). 2 increase or complicate (difficulties etc.). 3 make up (a composite whole). 4 settle (a matter) by mutual agreement. 5 law condone or conceal (a liability or offence) for personal gain. 6 (usu. Foll. By with) law come to terms with a person. [latin compono -pos- put together]