Webster's Revised Unabridged Dictionary · 1913

Weed

Weed (wēd) , noun

[Old English wede, Anglo-Saxon wade, wad; akin to Old Saxon wādi, giwādi, OFries, wēde, wēd, OD. wade, Old High German wāt, Icelandic vāe, Zend vadh to clothe.]

1.
A garment; clothing; especially, an upper or outer garment.
Lowly shepherd's weeds. — Spenser
Woman's weeds. — Shakespeare
This beggar woman's weed. — Tennyson
He on his bed sat, the soft weeds he wore Put off. — Chapman
2.
An article of dress worn in token of grief; a mourning garment or badge; as, he wore a weed on his hat; especially, in the plural, mourning garb, as of a woman; as, a widow's weeds.
In a mourning weed, with ashes upon her head, and tears abundantly flowing. — Milton

Weed , noun

A sudden illness or relapse, often attended with fever, which attacks women in childbed. [Scottish]

Weed , noun

[Old English weed, weod, Anglo-Saxon weód, wiód, akin to Old Saxon wiod, LG. woden the stalks and leaves of vegetables Dutch wieden to weed, Old Saxon wiodōn.]

1.
Underbrush; low shrubs. [Obsolete or Archaic]
One rushing forth out of the thickest weed. — Spenser
A wild and wanton pard... Crouched fawning in the weed. — Tennyson
2.
Any plant growing in cultivated ground to the injury of the crop or desired vegetation, or to the disfigurement of the place; an unsightly, useless, or injurious plant.
Too much manuring filled that field with weeds. — Denham

The word has no definite application to any particular plant, or species of plants. Whatever plants grow among corn or grass, in hedges, or elsewhere, and are useless to man, injurious to crops, or unsightly or out of place, are denominated weeds.

3.
Figuratively: Something unprofitable or troublesome; anything useless.
4.
(Stock Breeding) An animal unfit to breed from.
5.
Tobacco, or a cigar. [Slang]
Collocations (1)
Weed hook , a hook used for cutting away or extirpating weeds. — Tusser

Weed , transitive verb

[Anglo-Saxon weódian. See 3d Weed.]

1.
To free from noxious plants; to clear of weeds; as, to weed corn or onions; to weed a garden.
2.
To take away, as noxious plants; to remove, as something hurtful; to extirpate; -- commonly used with out; as, to weed out inefficiency from an enterprise.
Weed up thyme. — Shakespeare
Wise fathers... weeding from their children ill things. — Ascham
Revenge is a kind of wild justice, which the more man's nature runs to, the more ought law to weed it out. — Bacon
3.
To free from anything hurtful or offensive.
He weeded the kingdom of such as were devoted to Elaiana. — Howell
4.
(Stock Breeding) To reject as unfit for breeding purposes.