Definition of I spy in English:

I spy


mass noun
  • A children's game in which one player specifies the first letter of an object they can see, the other players then having to guess the identity of this object.

    • ‘In the beginning we'd amused ourselves by telling stories from our childhood and playing everything from I spy to the slug-bug game.’
    • ‘I loved playing I spy with my little eye, something beginning with ‘E'. I loved talking to the shiny silver robot.’
    • ‘Will and I talked most of the day and played noughts and crosses and I spy when we weren't.’