To combine so as to form a whole; mix. To produce or create by combining two or more ingredients or parts: pharmacists compounding prescriptions. To settle (a debt, for example) by agreeing on an amount less than the claim; adjust. To compute (interest) on the principal and accrued interest. To add to; increase: High winds compounded the difficulties of the firefighters. To combine in or form a compound. To come to terms; agree. Consisting of two or more substances, ingredients, elements, or parts. Botany Composed of more than one part. A combination of two or more elements or parts. See Synonyms at mixture. Linguistics A word that consists either of two or more elements that are independent words, such as loudspeaker, baby-sit, or high school, or of specially modified combining forms of words, such as Greek philosophia, from philo-, "loving,\u201d and sophia, "wisdom.\u201d Chemistry A pure, macroscopically homogeneous substance consisting of atoms or ions of two or more different elements in definite proportions that cannot be separated by physical means. A compound usually has properties unlike those of its constituent elements. Botany A leaf whose blade is divided into two or more distinct leaflets. Botany A pistil composed of two or more united carpels. A building or buildings, especially a residence or group of residences, set off and enclosed by a barrier. An enclosed area used for confining prisoners of war.