any of various legislative or governing bodies, in particular 政府立法机关,尤指 ■the smaller upper assembly in the US, US states, France, and other countries (美国、美国各州、法国及其他国家的)参议院 ■the state council of the ancient Roman republic and empire, which shared legislative power with the popular assemblies, administration with the magistrates, and judicial power with the knights 古罗马共和国(及罗马帝国)的元老院 ■the governing body of a university or college (大学或学院的)参议会
语源
Middle English: from Old French senat, from Latin senatus, from senex 'old man'