Definition of you can't teach an old dog new tricks in US English:

you can't teach an old dog new tricks

phrase

proverb
  • You cannot make people change their established patterns of opinion and behavior.

    • ‘He has surprised many by defying the adage that you can't teach an old dog new tricks by adopting a more attacking approach than he normally favours for his teams.’
    • ‘The latter may account for the fact that it is more difficult for elderly people to learn new motor skills; in other words, you can't teach an old dog new tricks.’
    • ‘They say you can't teach an old dog new tricks, but, apparently, you can take some old film ideas and give them a new twist.’
    • ‘They say you can't teach an old dog new tricks, but this winter they are finally going to be proven wrong.’
    • ‘‘Well, you can't teach an old dog new tricks,’ Ghost said, ‘But for some, there are exceptions.’’
    • ‘There is something to be said for that old saying that you can't teach an old dog new tricks.’
    • ‘I wonder if sometimes doctors think it's unsuitable because they think you can't teach an old dog new tricks.’
    • ‘Like they say, you can't teach an old dog new tricks.’
    • ‘Teddy's 75th minute free-kick which wrapped up England's victory had ‘Beckham’ stamped right through it to disprove the theory that you can't teach an old dog new tricks.’
    • ‘But I say that you can't teach an old dog new tricks.’