To set free; to liberate from slavery, prison, or any binding power.

grant freedom to; as from slavery or servitude; "Slaves were enfranchised in the mid-19th century"

To endow with a franchise; to incorporate into a body politic and thus to invest with civil and political privileges; to admit to the privileges of a freeman; to give the right to vote.

To grant a person the right to vote.

grant voting rights

To receive as denizens; to naturalize; as, to enfranchise foreign words.