Meaning : Carefully observant or attentive. On the lookout for possible danger.
Example :
A policy of open-eyed awareness.
The vigilant eye of the town watch.
There was a watchful dignity in the room.
A watchful parent with a toddler in tow.
Synonyms : argus-eyed, open-eyed, vigilant
Meaning : (of sleep) easily disturbed.
Example :
In a light doze.
A light sleeper.
A restless wakeful night.
Synonyms : light
Meaning : Marked by full consciousness or alertness.
Example :
Worked every moment of my waking hours.
Synonyms : waking