Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adjective: wakeful  weyk-ful
  1. Carefully observant or attentive; on the lookout for possible danger
    "a policy of wakeful awareness";
    - argus-eyed, open-eyed, vigilant
  2. (of sleep) easily disturbed
    "a restless wakeful night";
    - light
  3. Marked by full consciousness or alertness
    - waking

See also: alert, awake, shallow, watchful

Encyclopedia: Wakeful