1. To put seeds, bulbs, etc. in the earth so they can develop into fully developed herbage: Every spring, the family plants the small hard elements produced by the plant itself which can then grow into a new plant for edible food.
2. To place seeds or undeveloped foliage in the soil to produce crops: Farmers around the world are planting various kinds of food products so the rest of the world can be nourished and live better.
3. To establish an idea, etc. in a person's mind: The politician was planting seeds of doubt about his political opposition during a speech that was being broadcast on the radio.
4. To hide an explosive that is set to go off later: Fortunately, the police were able to arrest the terrorist before he could set off the bomb that he had planted in a car that was parked in the city.
5. To secretly place or conceal something among people's possessions in order to suggest that they are guilty of a crime: Greg planted some stolen goods in Shanna's unlocked car while she was returning a grocery cart so he could get some money as a bribe from her to keep him from telling the police.
6. To send someone to join a group or an organization to act as a spy or an informer: Mary found out that James, one of her coworkers, was an agent who had been planted in her administrator's office staff by a rival company.