weed

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A token of mourning, as a black band worn on a man's hat or sleeve.
• noun The black mourning clothes of a widow.
• noun Archaic An article of clothing; a garment.
• noun A plant considered undesirable, unattractive, or troublesome, especially one that grows where it is not wanted and often grows or spreads fast or takes the place of desired plants.
• noun An aquatic plant or alga, especially seaweed.
• noun Something considered useless, detrimental, or worthless.
• noun Tobacco.
• noun A cigarette.
• noun Marijuana.
• intransitive verb To clear of weeds.
• intransitive verb To remove (weeds). Often used with out:
• intransitive verb To eliminate as unsuitable or unwanted. Often used with out:
• intransitive verb To remove weeds.

from The Century Dictionary.

• noun The vegetative parts of the cotton-plant as opposed to the flowers and fruit.
• noun The mad-dog skull-cap or madweed, Scutellaria lateriflora.
• A reduced form of weeded, past participle of weed.
• To free from weeds or noxious plants.
• To take away, as noxious plants; remove what is injurious, offensive, or unseemly; extirpate.
• To free from anything hurtful or offensive.
• To root up and remove weeds, or anything resembling weeds.
• noun A garment of any sort, especially an outer garment; hence, garments in general, especially the whole costume worn at any one time: now commonly in the plural, and chiefly in the phrase widows' weeds. See widow.
• noun A general name for any sudden illness from cold or relapse, usually accompanied by febrile symptoms, taken by women after confinement or during nursing, especially milk-fever or inflammation of the breast.
• noun Lymphangitis in the horse, characterized by fever and temporary swelling of the limbs. It appears usually after a period of inactivity.
• noun A heavy weight.
• noun Any one of those herbaceous plants which are useless and without special beauty, or especially which are positively troublesome.
• noun A sorry, worthless animal unfit for the breeding of stock; especially, a leggy, loose-bodied horse; a race-horse having the appearance but wanting the other qualities of a thorough bred.
• noun A cigar; with the definite article, tobacco.

from the GNU version of the Collaborative International Dictionary of English.

• noun Scot. A sudden illness or relapse, often attended with fever, which attacks women in childbed.
• noun A garment; clothing; especially, an upper or outer garment.
• noun An article of dress worn in token of grief; a mourning garment or badge; ; especially, in the plural, mourning garb, as of a woman.
• noun Obs. or Archaic Underbrush; low shrubs.
• noun 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.
• noun Fig.: Something unprofitable or troublesome; anything useless.
• noun (Stock Breeding) An animal unfit to breed from.
• noun Slang Tobacco, or a cigar.
• noun a hook used for cutting away or extirpating weeds.
• transitive verb To free from noxious plants; to clear of weeds
• transitive verb To take away, as noxious plants; to remove, as something hurtful; to extirpate; -- commonly used with out.
• transitive verb To free from anything hurtful or offensive.
• transitive verb (Stock Breeding) To reject as unfit for breeding purposes.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb To remove unwanted vegetation from a cultivated area.
• noun archaic A garment or piece of clothing.
• noun archaic Clothing collectively; clothes, dress.
• noun archaic widow's weeds Female mourning apparel
• verb Simple past tense and past participle of wee.
• noun countable 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.
• noun countable A species of plant considered harmful to the environment or regarded as a nuisance.
• noun Short for duckweed
• noun uncountable, slang Marijuana.