arousal

Everyday

1. Arousal is the state of being awake, alert or excited, when the body and mind are ready for action. tree →
2. (science) Arousal is when the brain and body become active, for example when the heart beats faster with fear or excitement. tree →
3. (adult) Grown-ups also use it in a sense that is not for school. tree →

In the lessons

Used in science and psychology (sleep and arousal, fight-or-flight), sport (players need the right level of arousal, not too nervous, not too sleepy). Because of the adult sense, everyday speech often says «excitement» or «being alert» instead.

Examples

• Fear causes arousal: your heart beats faster and you breathe quickly. tree →
• Loud noise woke the sleeper into arousal. tree →
• Athletes try to control their arousal before a race. tree →
• Too much arousal can make a player nervous and clumsy. tree →
• Coffee increases arousal and keeps people awake. tree →
• Scientists measured the animals' arousal by their heart rate. tree →

Note

Uncountable. From «arouse». Because grown-ups also use it in an adult sense, it is best used in clear science contexts; for everyday feelings say «excitement», «alertness».