live wire

[lahyv]
noun Informal.
an energetic, keenly alert person.

Origin:
1900–05, Americanism

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
live wire (laɪv)
 
n
1.  informal an energetic or enterprising person
2.  a wire carrying an electric current

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Slang Dictionary

(live) wire definition


  1. n.
    an energetic and vivacious person. : With a wire like Taylor in charge, things will get done, that's for sure.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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American Heritage
Idioms & Phrases

live wire

A highly alert or energetic person. For example, Sally's a real live wire; she brightens up any gathering. This metaphoric term transfers a wire carrying electric current to a lively individual. [c. 1900]

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
One of the light's metal screws can contact an internal live wire.
It was then that the patient reportedly made contact with a live wire.
Adds requirements for covers, grounding and live wire exposure in the electricity code.
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