Webster's Revised Unabridged Dictionary · 1913

Heft

Heft , noun

Same as Haft, n. [Obsolete] — Waller

Heft , noun

[From Heave: compare hefe weight. Compare Haft.]

1.
The act or effort of heaving; violent strain or exertion. [Obsolete]
He craks his gorge, his sides, With violent hefts. — Shakespeare
2.
Weight; ponderousness. [Colloquial]
A man of his age and heft. — T. Hughes
3.
The greater part or bulk of anything; as, the heft of the crop was spoiled. [Colloquial United States] — J. Pickering

Heft , noun

[German]

A number of sheets of paper fastened together, as for a notebook; also, a part of a serial publication.
The size of “hefts” will depend on the material requiring attention, and the annual volume is to cost about 15 marks. — The Nation

Heft , transitive verb

1.
To heave up; to raise aloft. [obsolete]
Inflamed with wrath, his raging blade he heft. — Spenser
2.
To prove or try the weight of by raising. [Colloquial]