rationn.[F., fr. L. ratio a reckoning, calculation, relation, reference, LL. ratio ration. See Ratio.]1. A fixed daily allowance of provisions assigned to a soldier in the army, or a sailor in the navy, for his subsistence.()()2. Hence, a certain portion or fixed amount dealt out; an allowance; an allotment.()v. t. To supply with rations, as a regiment.()