Definition of live wire in US English:

live wire

noun

informal
  • An energetic and unpredictable person.

    • ‘There is some truth to the profile of fighter pilots as, well, live wires and risk-takers.’
    • ‘A robust Kernan was taking the ball through the middle or down the wings, Stephen Clarke was linking the ball to the full forwards and McNamee was an incredible live wire with his darting runs.’
    • ‘Beatrice, our youngest, has been harder than the other three put together - she's such a live wire.’
    • ‘James Cracknell, normally the live wire within this crew, was only just able to talk, his voice nearly gone.’
    • ‘Despite early health problems Belinda was always the live wire of the family.’
    • ‘Lachlan Ross was again putting in well, and Adam Taylor was a live wire around the packs.’
    • ‘Thomas was a real live wire, always on the go and cared about everybody, especially his brothers.’
    energetic person
    View synonyms

Pronunciation

live wire

/ˈlīv ˌwī(ə)r//ˈlaɪv ˌwaɪ(ə)r/