zapaziti

1. to notice; to observe
   Niko nije zapazio da je nestao novčanik. — No one noticed that the wallet was gone.
   Lekar je zapazio promenu na snimku. — The doctor noticed a change on the scan.
2. (of a person, talent) to spot; to take notice of
   Trener ga je zapazio na jednom turniru. — The coach spotted him at a tournament.

The imperfective counterpart is zapažati.