What is weed

Weed (noun) is a valueless plant growing wild, esp. one that grows on cultivated ground to the exclusion or injury of the crop.

Weed- A plant considered undesirable, unattractive, or troublesome, especially one growing where it is not wanted, as in a garden.

Weed — slang for the drug Marijuana, a crude drug made from the plant Cannabis sativa.

Weed (noun) A plant that is not valued where it is growing and is usually of vigorous growth. It is also slang for marijuana.