encyclopedia

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walking encyclopedia

A very knowledgeable person, as in Ask Rob-he's a walking encyclopedia of military history. A similar expression, a walking dictionary, was used by George Chapman in his poem "Tears of Peace" (c. 1600).

a walking dictionary

or

a walking encyclopedia

If you describe someone as a walking dictionary or a walking encyclopedia, you mean that they know a lot of words or facts. She raised five of us on her own and she's a walking dictionary. He was a walking encyclopedia of music, full of wit and charm. Note: People sometimes use other words instead of dictionary or encyclopedia. He's a walking database on anything relating to insurance.
See also: dictionary, walking

a walking ˈdictionary, encycloˈpedia, etc.

(informal) used to describe a human or living example of the thing mentioned: Geoff is a walking encyclopedia. He knows about everything.She’s a walking dictionary (= she knows a lot of words).
See also: walking
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