Meaning

noun an assembly (including one or more judges) to conduct judicial business

noun a room in which a lawcourt sits

noun the sovereign and his advisers who are the governing power of a state

originFrom Middle English court, from Old French cort, curt, from Late Latin cōrs, contracted from Latin cohors. Doublet of cohort. A court (noun sense 4.2) assembled to hear the testimony of Charles Lindbergh. The room is also a court (noun sense 4.1). Professional tennis players playing on a tennis court (noun sense 5) in New Delhi, India

Etymology from Wiktionary, CC BY-SA 3.0