1. Fully awake
   "so excited she was wide-awake all night"
   - unsleeping 
2. Fully alert and watchful
   - heads-up

See also: alert, awake, watchful

• white Anglo-Saxon Protestant
• white ant
• white arsenic
• white ash
• white aspen
• white avens
• white backlash
• white baneberry
• white basswood
• white bead
• white bean
• white bedstraw
• white beech
• white beer
• white birch
• white blood cell
• nitrogen cycle
• nitrogen dioxide
• nitrogen fixation
• nitrogen mustard
• nitrogen narcosis
• nitrogen oxide
• nitrogen trichloride
• nitrogen-bearing
• nitrogen-fixing