noun:a small timepiece worn typically on a strap on one's wrist
She glanced at her watch to check the time.
verb:to look at or observe attentively over a period of time
We decided to watch the sunset from the hill.
verb:to be vigilant or alert
Watch for oncoming traffic when you cross the street.
verb:to keep guard or surveillance over a person, place, or thing
The security team will watch the entrance throughout the night.
noun:a period of duty or service, especially on a ship or in a military context
He was assigned to the night watch on the battleship.
