{To take up arms}. Same as {To take arms}, above. {To take upon one's self}. (a) To assume; to undertake; as, he takes upon himself to assert that the fact is capable of proof. (b) To appropriate to one's self; to allow to be imputed to, or inflicted upon, one's self; as, to take upon one's self a punishment. {To take up the gauntlet}. See under {Gauntlet}.