Definition of do someone/something a power of good in English:

do someone/something a power of good

phrase

informal
  • Be very beneficial to someone or something.

    • ‘Futilely smashing things up does you a power of good.’
    • ‘The walk did me a power of good, though, and my legs didn't act up even to the last.’
    • ‘The open air did me a power of good, except on the way back when the wind was in my face not at my back, when it just sliced right through me.’
    • ‘I reckon a session or two with a successful cattle or sheep dealer would do them a power of good.’
    • ‘Make no mistake, having the Foreign Secretary and later the Leader of the House battling for the interests of racing did the sport a power of good.’
    • ‘We had a walk into town and it did us a power of good.’
    • ‘This does them a power of good, and they all enjoy it.’
    • ‘It still does you a power of good if you are applying for a job as a teacher and you know a politician on the appointments board.’
    • ‘We moved here earlier than we'd planned and it's doing us a power of good.’
    • ‘They were lucky to hold on, but the most important thing is this was another victory and as such will do their confidence a power of good.’