The definition of an authority is a public organization that controls an area or certain activities.(noun)
A corporation that provides bus service in a city is an example of a transit authority.
Authority is defined as a person who is considered an expert in his field.(noun)
A philosophy scholar who publishes books is an example of an authority.
See authority in Webster's New World College Dictionary
noun pl. authorities
Origin: ME autorite < OFr autorité, auctorité < L auctoritas < auctor, author
See authority in American Heritage Dictionary 4
noun pl. au·thor·i·ties
Origin: Middle English auctorite
Origin: , from Old French autorite
Origin: , from Latin auctōritās, auctōritāt-
Origin: , from auctor, creator; see author.
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