<p><strong>Noun</strong></p><ul><li>an act of leaking; leak.</li><li>something that leaks in or out.</li><li>the amount that leaks in or out.</li><li>Commerce: an allowance for loss by leaking.</li><li>Physics, Electricity: the loss of all or part of a useful agent, as of the electric current that flows through an insulator (leakage current) or of the magnetic flux that passes outside useful flux circuits (leakage flux).</li></ul>