What is collocation?

In my last post I set a challenge that required you to understand the concept collocation, but later it occurred to me that you might not understand what it is.

  • We say “Merry Christmas.”
  • We say “Happy birthday.”
  • We never say “Merry birthday.”

There is no grammatical reason why we cannot say Merry birthday. In fact the only explanation is that, well, that’s just the way it is! Welcome to the frustrating world of collocation.

How to define ‘collocation’?

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