CONCESSIVE
characterized by or tending to concession
(of a preposition or conjunction) introducing a phrase or clause denoting a circumstance which might be expected to preclude the action of the main clause, but does not (e.g. in spite of, although).
(of a preposition or conjunction) introducing a phrase or clause denoting a circumstance which might be expected to preclude the action of the main clause, but does not (e.g. in spite of, although).