What is the meaning of Leach?

A quantity of wood ashes, through which water passes, and thus imbibes the alkali.

A tub or vat for leaching ashes, bark, etc.

Alternative spelling of leech.

A jelly-like sweetmeat popular in the fifteenth century.

To purge a soluble matter out of something by the action of a percolating fluid.

To part with soluble constituents by percolation.

To bleed; to seep.

Source: wiktionary.org