What is the meaning of weeds?

noun

• Any plant that crowds out cultivated plants.
  • synonyms: weed
• A black band worn by a man (on the arm or hat) as a sign of mourning.
  • synonyms: weed, mourning band
• Street names for marijuana.
  • synonyms: pot, grass, green goddess, dope, weed, gage, sess, sens, smoke, skunk, locoweed, Mary Jane
• A black garment (dress) worn by a widow as a sign of mourning.
  • synonyms: widow's weeds

verb

• Clear of weeds.
  • usage: "weed the garden"
  • synonyms: weed