A wild plant growing where it is not wanted and in competition with cultivated plants. The garden was overrun with weeds, making it difficult for the flowers to thrive.
A slang term for marijuana, a psychoactive drug from the Cannabis plant. He was caught with a small amount of weed in his backpack.
(usually plural, archaic) Mourning clothes, especially those worn by a widow. The widow appeared at the service clad in solemn weeds.