Webster's Revised Unabridged Dictionary · 1913

Manure

Manure (mȧ*nūr") , transitive verb

[Contr, from Old French manuvrer, manovrer, to work with the hand, to cultivate by manual labor, French manouvrer. See Manual, Ure, Opera, and compare Inure.]

1.
To cultivate by manual labor; to till; hence, to develop by culture. [Obsolete]
To whom we gave the strand for to manure. — Surrey
Manure thyself then; to thyself be improved; And with vain, outward things be no more moved. — Donne
2.
To apply manure to; to enrich, as land, by the application of a fertilizing substance.
The blood of English shall manure the ground. — Shakespeare

manure (mȧ*nūr") , noun

Any matter which makes land productive; a fertilizing substance.
dung, the contents of stables and barnyards, decaying animal or vegetable substances, etc. — Dryden