n.

1. 约束；限制[C][（+on）]
   legal constraints on the company's activities

   对该公司活动法律的限制

2. 强迫；强制[U]
   He acted under constraint.

   他被迫采取行动。

3. 抑制；拘束；态度不自然[U]
   She showed constraint in the presence of the strangers.

   她在陌生人面前显得很拘束。

4. 拘禁[U]
5. 拘束（或限制）的事物[C]

n.

1. a limitation or restriction.
2. stiffness of manner and inhibition.