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

See also: alert, awake, watchful

• turncoat
• turncock
• turndown
• turned
• turned on
• turned out
• turner
• Turner's syndrome
• turnery
• Turnicidae
• turning
• turning away
• turning circle
• turning point
• turnip
• turnip bed
• turnip cabbage
• turnip greens
• turnip plant
• turnip-rooted celery
• turnip-rooted parsley
• turnip-shaped
• Turnix
• Turnix sylvatica
• turnkey