n.

1. 松弛，放松[U][（+of/in）]
2. 缓和，放宽，减轻[U][（+of/in）]
   There must be no relaxation in our high standards.

   我们坚持高标准，决不容许有些放松。

3. 休息；消遣，娱乐[U][C]

n.

1. the action of relaxing or the state of being relaxed.
2. Physics  the return of a system to equilibrium following disturbance.