Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. An agent, such as yeast, that causes batter or dough to rise, especially by fermentation.
- n. An element, influence, or agent that works subtly to lighten, enliven, or modify a whole.
- v. To add a rising agent to.
- v. To cause to rise, especially by fermentation.
- v. To pervade with a lightening, enlivening, or modifying influence.
Century Dictionary and Cyclopedia
- n. See leven.
- n. A substance that produces or is designed to produce fermentation, especially in dough; specifically, a mass of fermenting dough, which, mixed with a larger quantity of dough or paste, produces fermentation in it and renders it light.
- n. Something that resembles leaven in its effects, as some secret or impalpable influence working a general change, especially a change for the worse.
- To excite fermentation in; raise and make light, as dough or paste.
- To imbue; work upon by some invisible or powerful influence.
- To ripen; mature.
Wiktionary
- n. Any agent used to make dough rise or to have a similar effect on baked goods.
- v. transitive To add a leavening agent.
- v. transitive To cause to rise by fermentation.
- v. transitive, figuratively To temper an action or decision.
- v. To imbue; to infect; to vitiate.
GNU Webster's 1913
- n. Any substance that produces, or is designed to produce, fermentation, as in dough or liquids; esp., a portion of fermenting dough, which, mixed with a larger quantity of dough, produces a general change in the mass, and renders it light; yeast; barm.
- n. Anything which makes a general assimilating (especially a corrupting) change in the mass.
- v. To make light by the action of leaven; to cause to ferment.
- v. To imbue; to infect; to vitiate.
WordNet 3.0
- n. an influence that works subtly to lighten or modify something
- v. cause to puff up with a leaven
- n. a substance used to produce fermentation in dough or a liquid
Etymologies
- Middle English levain, from Old French, from Late Latin levamen, instead of levamentum, ultimately from Latin levō ("I raise"). (Wiktionary)
- Middle English, from Old French levain, from Vulgar Latin *levāmen, from Latin levāre, to raise; see legwh- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“We are leaven, in heaven. leaven-# a substance used to produce fermentation in dough or a liquid”
“_But_," he resumed, with renewed seriousness -- "_But ef Christians on'y knowed it_, dey kin put a _little leaven o 'solid Christianity_ in all de charity flour dey gi'es away, an' hit'll _leaven de whole lot_ so strong dat _too much water can't spile it_, nur _too much fire can't scorch it_, nur _too much fore-sight_ (ur whatever dis heah is de”
“So "leaven" is used of false doctrine (Mt 16: 12: compare Mt 13: 33).”
“The disciples did not understand him as referring to their doctrine, because the word leaven was not often used among the”
“Apostle Paul also makes clear, saying: Christ our Passover is sacrificed for us, and That ye may be unleavened, not having any leaven (for he calls leaven wickedness), but that ye may be a new dough.”
“But whether we call the leaven a good or evil thing makes little difference.”
“The disciples, whose minds were occupied with their lack of provisions, the moment they heard the word leaven, thought of bread, concluded it must be because of its absence that he spoke of leaven, and imagined perhaps a warning against some danger of defilement from”
“Jews in searching every corner of their houses, and "purging out" every particle of leaven from the time of killing the lamb before the”
“For even -- an additional reason, besides that in 1Co 5: 6, and a more cogent one for purging out every leaven of evil; namely, that Christ has been already sacrificed, whereas the old leaven is yet unremoved, which ought to have been long ago purged out.”
“The exclusion of leaven for seven days would not be attended with inconvenience in the East, where the usual leaven is dough kept till it becomes sour, and it is kept from one day to another for the purpose of preserving leaven in readiness.”
Lists
These user-created lists contain the word ‘leaven’.
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GRE Barrons Wordlist
A complete Barron's Wordlist for GRE preparation. Your online flashcard replacement.
abase, abash, abate, abbreviate, abdicate, aberrant, aberration, abet, abeyance, abhor, abject, abjure and 4087 more...
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RELI - words with Biblical connotations
Words in the Bible evoking biblical stories or with special spiritual meaning. Proper names have been reduced to the minimum.
ark, judgement, holy, saint, baptism, spirit, love, eternal, altar, balsam, covenant, flood and 1115 more...
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RELI - words you immediately associat...
baptism, almighty, Balaam, altar, anoint, archangel, apostle, advent, writings, wonders, timbrel, thorns and 341 more...
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big book gre
abase, abbess, abbey, abbot, abdicate, abdomen, abdominal, abduction, abed, aberration, abet, abeyance and 6689 more...
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A Crumb Of Comfort
Types of bread & breadmaking terms. Mainly I'm looking for plain or savoury breads but I'll accept the sweet-ish ones as long as they are more bread than cake :-)
lagana, khobz, pita, foccaccia, ciabatta, bap, altamura, knead, leaven, crumpet, muffin, bagel and 202 more...
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Manji's Random Wordlist
The title says it all
velour, vivacity, subterfuge, sable, divination, gentry, vindication, compendium, pistons, metamorphosis, methodology, polyphony and 91 more...
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NTDW1
template, modal, sublingual, tandem, polycentric, septuagenarian, token, irrevocable, denotive, augural, aberrant, phlebotomy and 1188 more...
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The Last Werewolf
This novel by Glen Duncan, aside from being a ripping yarn and beautifully written, is just littered with words that I had to look up and discover that often his use of the word not only fitted per...
gurns, bok, chimney breast, dichotomy, Platonic form, filthy, Platonic Form, mathematics, BAM, skirls, clarity, blundering and 298 more...
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Ny New Words
From Barron Wordlist the New Words
lap, lank, languor, languish, lancet, lance, lampoon, larceny, larder, largess, lascivious, latitude and 120 more...
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Vocab++
Words as I learn them.
fetid, mezzanine, hiatus, austerity, subliminal, resplendent, implacable, impugn, debase, exiguous, cirque, holster and 2538 more...
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Gil Blas
Interesting words and usages from Smollett's 1749 translation of Lesage's L'Histoire de Gil Blas de Santillane
reck, durance, rhodomontade, hangdog, trap, lustre, pin, boggle, dandle, birthday suit, colic, gripes and 238 more...
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drseatbelt's Words
bilious, centenarian, droll, palliative, cortege, stultify, polysemy, suffuse, lambent, timorous, aegis, modicum and 236 more...
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5-0
Hecko, words! I’m so happy I’ve found you. I want to keep you all and never want to lose you again. I hope you like it here.
amscray, thistledown, tine, tinsel, pungent, snarl, wail, lanky, viscid, dawdle, luminous, stow and 2719 more...
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bobodod's Words
cultie, screwery, gauge, wanker, truthiness, harangue, mediocre, ragamuffin, elysian, spoonerism, loquacious, apostle and 240 more...
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Luck in the Shadows
Words and phrases from Lynn Flewelling's book, Luck in the Shadows.
belly, barbican, pediment, withers, hirsute, oriel, tabard, telesm, thaumaturgy, switch, spargetaction, towheaded and 125 more...
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ash
ash
abash, abate, abbreviate, abdicate, aberrant, aberration, abet, abeyance, abhor, abide, abject, abjure and 4874 more...
Tweets
Looking for tweets for leaven.

Louises Somewhere in the back of our minds had been the belief that my being in drag would leaven the horror. And if I laugh at any mortal thing. 'Tis that I may not weep. It had failed in the way that comic music at a funeral can fail. From "The Last Werewolf" by Glen Duncan. Feb 28, 2012
yarb I shall pass over in silence the description of a thousand ceremonies, necessary to be gone through, in order to my return into the bosom of the church; suffice it to say, that I forswore Mahometanism with much more sincerity than I had pledged myself to it. After having entirely purged myself from my Algerine leaven, I sold my ship, and set all my slaves at liberty.
- Lesage, The Adventures of Gil Blas of Santillane, tr. Smollett, bk 5 ch. 1 Sep 19, 2008