verb (used with object)

to dissolve out soluble constituents from (ashes, soil, etc.) by percolation.
to cause (water or other liquid) to percolate through something.

verb (used without object)

(of ashes, soil, etc.) to undergo the action of percolating water.
to percolate, as water.


Origin of leach

1425–75; late Middle English leche leachate, infusion, probably Old English *læc(e), *lec(e), akin to leccan to wet, moisten, causative of leak
Related formsleach·a·ble, adjectiveleach·a·bil·i·ty, nounleach·er, nounun·leached, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for leached

seep, filter, strain, percolate, extract, filtrate, lixiviate

Examples from the Web for leached

Contemporary Examples of leached

  • And yet, if you look closely, it's there, it's leached into literature.

    The Daily Beast logo
    The Best Stoner Novels

    Sam Munson

    April 20, 2010

Historical Examples of leached

British Dictionary definitions for leached



Bernard (Howell). 1887–1979, British potter, born in Hong Kong




to remove or be removed from a substance by a percolating liquid
to lose or cause to lose soluble substances by the action of a percolating liquid


the act or process of leaching
a substance that is leached or the constituents removed by leaching
a porous vessel for leaching
Derived Formsleacher, noun

Word Origin for leach

C17: variant of obsolete letch to wet, perhaps from Old English leccan to water; related to leak




a variant spelling of leech 2
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for leached



Old English leccan "to moisten, water, wet, irrigate," (see leak). The word disappears, then re-emerges late 18c. in a technological sense in reference to percolating liquids. Related: Leached; leaching.

Online Etymology Dictionary, © 2010 Douglas Harper