Definition of on the watch for
- When you're driving in winter you should always be on the watch for ice on the roads.
- I am always on the watch for a good bargain.
: to keep vigil as a devotional exercise
: to be awake during the night
: to be attentive or vigilant
: the act of keeping awake to guard, protect, or attend
: the state of being wakeful
: a wake over a dead body
What made you want to look up on the watch for? Please tell us where you read or heard it (including the quote, if possible).