Preposition(n.) A word employed to connect a noun or a pronoun, in an adjectival or adverbial sense, with some other word; a particle used with a noun or pronoun (in English always in the objective case) to make a phrase limiting some other word; -- so called because usually placed before the word with which it is phrased; as, a bridge of iron; he comes from town; it is good for food; he escaped by running.
Preposition(n.) A proposition; an exposition; a discourse.
Prepositional(a.) Of or pertaining to a preposition; of the nature of a preposition.
Prepositive(a.) Put before; prefixed; as, a prepositive particle.
Prepositive(n.) A prepositive word.

Words within prepositions