To cut off from the membership of a community. To deprive of citizenship; to disfranchise. rare after 17th century.

At the Universities of Oxford and Cambridge: to ban (a tradesman) from trading with or supplying goods to the undergraduates.

To deprive (a student) of commons in a college. Also: (at the University of Oxford) to expel from college. Compare "discommons".

To deprive of the character of a common; to enclose (common land). Also in figurative contexts.