noun

1. The act of arousing or the state of being aroused.

   "bodily arousal"

2. Sexual arousal.

   "Some people get sexual arousal from the depiction of feet."

3. 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.

4. Arousal from sleep or hibernation.

   "the animal undergoes regular spells of arousal"