Definition of once in a lifetime in English:

once in a lifetime

phrase

  • (of a chance or experience) unlikely to occur more than once in a person's life.

    ‘being part of the Commonwealth Games has been a once in a lifetime experience’
    • ‘It's a once in a lifetime moment and a New Zealander has never won before.’
    • ‘This is a once in a lifetime chance to change the future of this part of the county.’
    • ‘Perhaps once in a lifetime, if we are very lucky, our paths may cross with someone who is destined to make an enormous change in our lives.’
    • ‘It's going to be a once in a lifetime event to raise money for the tragedy.’
    • ‘For many girls the tournament was a once in a lifetime opportunity.’
    • ‘This trip is a once in a lifetime experience.’