Definitions of vegetate:

• verb:   grow or spread abnormally

  Example: "Warts and polyps can vegetate if not removed"

• verb:   grow like a plant

  Example: "This fungus usually vegetates vigorously"

• verb:   produce vegetation

  Example: "The fields vegetate vigorously"

• verb:   establish vegetation on

  Example: "They vegetated the hills behind their house"

• verb:   lead a passive existence without using one's body or mind
• verb:   propagate asexually

  Example: "The bacterial growth vegetated along"

• verb:   engage in passive relaxation

  Example: "After a hard day's work, I vegetate in front of the television"