Definition of plant:
(n) :
an
organism that is not an animal, especially an organism capable of photosynthesis. Typically a small or herbaceous organism of this kind, rather than a
tree; an
organism of the kingdom Plantae. Traditionally (up to early 20th Century), any of the plants, fungi, lichens, algae, etc
"that gun's not mine! It's a plant! I've never seen it before!"
(v) :
to place (a seed or plant) in
soil or other
substrate in order that it may live and grow; to place (an
object, or sometimes a person), often with the implication of intending deceit
"that gun's not mine! It was planted there by the real murderer!"