compound

1. Compute a charge, fee, or increment on an amount to which another charge, fee, or increment has already been added.

2. Substance formed by a chemical reaction between two or more elements combined in a fixed proportion. Compounds are held together by covalent or ionic bonds and (unlike mixtures) cannot be separated by physical means into their constituents.

3. Settle a matter in exchange for money, such as in a composition.

4. Aggravate an offense by committing another offense or by bad behavior. See also compounding a crime.