As a noun:
* The army's regiment marched in perfect formation. (referring to a military unit)
* She followed a strict regiment of exercise and diet. (referring to a strict routine)
* The doctor prescribed a regiment of medication for the patient's illness. (referring to a prescribed course of treatment)
As a verb:
* The general regimented his troops into a disciplined force. (meaning to organize or control strictly)
* The chef regimented the kitchen staff to ensure efficiency. (meaning to organize and control)
* My life feels regimented by deadlines and responsibilities. (meaning to be restricted and controlled)