[more curious; most curious]
1 : having a desire to learn or know more about something or someone
The cat was naturally curious about its new surroundings.
They were curious to find out who won the game.
We're curious about why you never called us.
2 : strange, unusual, or unexpected
She found a curious old clock in the attic.
That's curious [=weird, strange, odd]—I thought I left my keys right here.
The birds were engaged in some curious behavior.