weed

(noun) any plant that crowds out cultivated plants.

(noun) a black band worn by a man (on the arm or hat) as a sign of mourning. Synonyms: mourning band.

(noun) street names for marijuana. Synonyms: pot, grass, green goddess, dope, gage, sess, sens, smoke, skunk, locoweed, Mary Jane.

(verb) clear of weeds. Examples: "Weed the garden."