• Compound (chemistry), a combination of two or more elements
• Compound (enclosure), a cluster of buildings having a shared purpose, usually inside a fence or wall
• Compound (fortification), a version of the above fortified with defensive structures
• Compound (linguistics), a word that consists of more than one radical element
• Compound (music), an attribute of an interval or time signature
• Compounding, the mixing of drugs in pharmacy
• Polyhedral compound, a polyhedron composed of multiple polyhedra sharing the same centre

Compound may also refer to:

• Compound chocolate, a chocolate substitute
• Compound fracture, complete fractures of bone where at least one fragment has damaged the skin, soft tissue or surrounding body cavity
• Compound interest, unpaid interest that is added to the principal so that subsequent interest is calculated on the grossed amount
• Compound engine, a steam engine in which steam is expanded through a series ot two or three cylinders before exhaust.
• Compound sentence (linguistics), a type of sentence made up of two or more independent clauses and no subordinate (dependent) clauses