(n.) The expanse of space surrounding the earth; esp., that which seems to be over the earth like a great arch or dome; the firmament; the sky; the place where the sun, moon, and stars appear; -- often used in the plural in this sense.
(n.) The dwelling place of the Deity; the abode of bliss; the place or state of the blessed after death.
(n.) The sovereign of heaven; God; also, the assembly of the blessed, collectively; -- used variously in this sense, as in No. 2.
(n.) Any place of supreme happiness or great comfort; perfect felicity; bliss; a sublime or exalted condition; as, a heaven of delight.
(v. t.) To place in happiness or bliss, as if in heaven; to beatify.
(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. t.) To make light by the action of leaven; to cause to ferment.
(v. i.) To become weak or weaker; to lose strength, spirit, or determination; to become less positive or resolute; as, the patient weakened; the witness weakened on cross-examination.
(v. t.) To make weak; to lessen the strength of; to deprive of strength; to debilitate; to enfeeble; to enervate; as, to weaken the body or the mind; to weaken the hands of a magistrate; to weaken the force of an objection or an argument.
(v. t.) To reduce in quality, strength, or spirit; as, to weaken tea; to weaken any solution or decoction.