·add. ·noun Fees charged for storage in tanks.
II. Tankage ·add. ·noun The capacity or contents of a tank or tanks.
III. Tankage ·add. ·noun The act or process of putting or storing in tanks.
IV. Tankage ·add. ·noun Waste matter from tanks; ·esp., the dried nitrogenous residue from tanks in which fat has been rendered, used as a fertilizer.