Peek/piːk/ Definition 1 of 5Pro Tip 1/3Secretive Action Use 'peek' when implying a secretive or sneaky action, often to avoid getting caught. She peeked at the recipe while the chef wasn't looking. Pro Tip 2/3Brief Moment 'Peek' suggests a very brief moment of action, not a prolonged one. He quickly peeked outside before closing the curtains. Pro Tip 3/3Partial View 'Peek' often involves seeing only a part of something, not the whole. From behind the door, I could only peek at a part of the room.