Leaven

//ˈlɛv.ən// noun, verb

Definitions

Noun
  1. 1
    Any agent used to make dough rise or to have a similar effect on baked goods. countable, uncountable
  2. 2
    an influence that works subtly to lighten or modify something wordnet
  3. 3
    Anything that induces change, especially a corrupting or vitiating change. countable, figuratively, uncountable

    "Take heed, beware of the leaven of the Pharisees, and of the leaven of Herod."

  4. 4
    a substance used to produce fermentation in dough or a liquid wordnet
  5. 5
    Chametz. countable, uncountable

    "On the fourteenth day of Nisan men search for leaven by candlelight."

Verb
  1. 1
    To add a leavening agent. transitive

    "Yeast is used to leaven bread, making it rise during baking."

  2. 2
    cause to puff up with a leaven wordnet
  3. 3
    To cause to rise by fermentation. transitive
  4. 4
    To temper an action, decision, attitude, characteristic, etc. figuratively, transitive

    "Duke. No more euasion: We haue with a leauen'd, and prepared choice Proceeded to you; therefore take your honors:[...]"

  5. 5
    To imbue; to infect; to vitiate. figuratively, transitive

    "The comedian's jokes helped leaven the atmosphere during the serious meeting."

Show 1 more definition
  1. 6
    To rise or become larger; to prove.

Etymology

Etymology 1

From Middle English levayn, borrowed from Old French levain, from Vulgar Latin *levāmen, a noun based on Latin levō (“raise”).

Etymology 2

From Middle English levayn, borrowed from Old French levain, from Vulgar Latin *levāmen, a noun based on Latin levō (“raise”).

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