To constrain is to impose limitations or restrictions on someone or something, or to force yourself or someone else to act in a certain way.
(verb)
- When you limit someone's freedom, this is an example of a situation where you constrain that person.
- When you compel someone to follow a specific course of action, this is an example of a situation where you constrain that person.
- When you force yourself to act in a certain manner, this is an example of a situation where you constrain your behavior.