No, a compound lift is a multi-joint movement, not multi-muscle (there are no single-muscle movements). Example: bench press is a compound movement because you use 2 axes of rotation, the elbow and shoulder. A chest flye is a single-joint movement because you use one axis of rotation, the shoulder (but still multiple muscle groups, in this case pectorals, anterior deltoids for concentric or lift phase and posterior deltoid and latissimus dorsi for eccentric or lowering phase).