理論上 lǐlùnshang theoretically Origin Definitions Defs Strokes Stroke Words Sentences Sents 理论 理論 lǐlùn noun theory a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained; doctrine上 shang locative on (suffix) on; in; at; on the surface of; used after a noun to indicate a location, scope, or aspect