A physiological and psychological state of being awake or reactive to stimuli, including elevated heart rate and blood pressure and a condition of sensory alertness, mobility and readiness to respond.
The act of arousing or the state of being aroused.
Arousal from sleep or hibernation.
Sexual arousal.
An irrational need or irresistible urge to perform some action, often despite negative consequences.
The use of authority, influence, or other power to force (compel) a person or persons to act.
The lawful use of violence (i.e. by the administration).