Leav"en (?), n. [OE. levain, levein, F. levain, L. levamen alleviation, mitigation; but taken in the sense of, a raising, that which raises, fr. levare to raise. See Lever, n.]

1.

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.

2.

Anything which makes a general assimilating (especially a corrupting) change in the mass.

Beware of the leaven of the Pharisees, which is hypocrisy. Luke xii. 1.

 

© Webster 1913.


Leav"en, v. t. [imp. & p. p. Leavened (?); p. pr. & vb. n. Leavening (?).]

1.

To make light by the action of leaven; to cause to ferment.

A little leaven leaveneth the whole lump. 1 Cor. v. 6.

2.

To imbue; to infect; to vitiate.

With these and the like deceivable doctrines, he leavens also his prayer. Milton.

 

© Webster 1913.

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