·noun One who, or that which, contributes aid or additional supplies; an assistant; an Auxiliary.
II. Subsidiary ·adj Furnishing aid; assisting; auxiliary; helping; tributary; especially, aiding in an inferior position or capacity; as, a subsidiary stream.
III. Subsidiary ·adj Of or pertaining to a subsidy; constituting a subsidy; being a part of, or of the nature of, a subsidy; as, subsidiary payments to an Ally.