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

See also: alert, awake, watchful

• decentalisation
• decently
• decentralisation
• decentralise
• decentralised
• decentralising
• decentralization
• decentralize
• decentralized
• decentralizing
• deception
• deceptive
• deceptively
• deceptiveness
• decerebrate
• decertify
• dechlorinate
• deci-
• decibel
• scoreline
• scorer
• scores
• scoria
• scoriaceous
• scoring