Webster’s Revised Unabridged Dictionary · 1913
Leakage
Leak′age (·āj; 48), n. [Cf. D. lekkage, for sense 1.] 1. A leaking; also, the quantity that enters or issues by leaking.
2. (Com.) An allowance of a certain rate per cent for the leaking of casks, or waste of liquors by leaking.