Definition of twain in US English:

twain

cardinal number

  • ‘he split it in twain’
    archaic term for two

Phrases

  • never the twain shall meet

    • Used to suggest that two things are too different to coexist.

      ‘Ulster people are British and Irish people are Irish, and never the twain shall meet’
      • ‘The band members sat in the Third Class carriage while the brethren of the Loyal Orange Lodge adorned the First Class carriage; never the twain shall meet.’
      • ‘Database systems and operating systems just developed in two very separate worlds and never the twain shall meet.’
      • ‘If I learned anything from Star Trek it's this: logic is logic and emotion is emotion and never the twain shall meet.’
      • ‘This doesn't mean, however, that never the twain shall meet.’
      • ‘Work is work and play is play and never the twain shall meet.’
      • ‘Women are women, and men are men, and never the twain shall meet.’
      • ‘You have your life, they have theirs and never the twain shall meet.’
      • ‘It was Rudyard Kipling who said, ‘east is east, west is west, and never the twain shall meet.’’
      • ‘Each will look after their own, and never the twain shall meet.’
      • ‘You are old enough to know that she did it her way, you're doing it your way, and never the twain shall meet.’

Origin

Old English twegen, masculine of twā (see two).

Pronunciation

twain

/tweɪn//twān/