(1)权力(势，威)(power to command and control other people)[U]：a person of ～ 权威人物;a person in～掌权人物;report sth to those in～向掌权者们报告某事;Who is in～there? 那儿谁管事?have/exercise～over sb 对某人具有/行使权威;act under sb's～在某人领导下做事;His voice always carries a note of～.他的话音中总是带着一种居高临下的口吻。speak/write with～以权威的口吻讲话/写东西;speak to sb in a position of～以领导的身份对某人说话;〖同〗power，command，control;

(2) 1)做某事的权力(power or right to do sth specific)[U][N+to-inf]：have (the)～to grant permission/ sign cheques/ search a building 有权给予准许/签署支票/搜查大楼;You have no～to do that.你没有权力做那事。He gave me the～to act on his behalf.他授权我代表他办事。Who gave you～to punish him? 谁给你权力惩罚他?He has our～to publish the book.他得到我们的授权出版这本书。2)授权证明(official permission to have this power or right)[C，通常sing]：Where is your～to search my house? 你们搜查我的房子有什么许可证明?Here is my～.这是我的授权证书。do sth with a signed～凭签署的授权证书做某事;

(3)掌权者，当局(person or organization that has the power to command or control other people)[C，常pl]：the army/school～ies军队/学校当局;health/sports～ies卫生/体育主管部门;the～ies at the town hall 市政当局;report sth to the～ies 向当局报告某事;The government is the highest～in the country.政府是国家的最高当局。be in the care of the local～受地方当局管;〖同〗government，administration;

(4)1)权威人士(person who is an expert on a particular subject)[C]：The professor is a(great)～on art/literature/history.这位教授是艺术/文学/历史方面的权威。a leading agricultural/industrial～一位农业/工业方面的主要权威;〖同〗expert，specialist，scholar;2)权威性的东西(book，etc that can be referred to on a particular subject)[C]：A good dictionary is an～on the meanings of words.一本好字典是词义的权威依据。3)根(依)据，来源(person，book，etc mentioned as the place where one found certain information)[C]：I can find no～for such usage of the word.我找不到这个字这么用的根据。sb's～for a statement 某人一种说法的依据;Always quote your～ies.你要处处注明出处。

(5)权威，影响力(power to influence)[U]：The secretary has a lot of～with the manager/the young man.这秘书对那经理/年轻人很有影响力。Napoleon was a man of～.拿破仑曾是个很有影响的人物。the～of a parent 家长的权威性;His～on the subject is unquestioned.他在这方面的权威不容置疑。

←′author n 作者;创始人;

→ au͵thori′tarian adj极权主义的;n 极权主义者;au͵thori′tarianism n 极权主义;au′thoritative adj 有权威(可信)的;有权力(官方)的;权威(命令式)的;′authorize-ise vt 授权;批准，许可;͵authori′zation，-′sation n 授权;委任状;

【辨异】authority与influence都可表示“支配他人行为和思想的力量”。authority指因地位和官职而具有的命令他人的权力，如：have authority over subordinates(对下属具有权威);influence指个人(非官方)的，因品格、能力、身份等而对他人能产生的影响力，如：have influence over one's friends(对朋友具有影响力)。