We can in fact only define a weed, mutatis mutandis, in terms of the well-known definition of dirt - as matter out of place. What we call a weed is in fact merely a plant growing where we do not want it.

We can in fact only define a weed, mutatis mutandis, in terms of the well-known definition of dirt - as matter out of place. What we call a weed is in fact merely a plant growing where we do not want it.