prep.

Noun

preposition (plural prepositions)

1. (strict-sense) Any of a class of non-inflecting words and multiword terms typically employed to connect a following 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.
   • 322. The parts of speech which are neither declined nor conjugated, are called by the general name of particles. 323. They are adverbs, prepositions, conjunctions, and interjections.1844, E. A. Andrews, First Lessions in Latin; or Introduction to Andrews and Stoddard's Latin Grammar, 6th edition, Boston, page 91
2. (broadly) An adposition.
3. (obsolete) A proposition; an exposition; a discourse.
   • […] he made a longe preposicion & oracion cōcernynge yͤ allegiaūce which he exortyd his lordes to owe1811 [1516], Robert Fabyan, edited by Sir Henry Ellis, The New Chronicles of England and France, page 116

Adjective

prepositional (not comparable)

1. Of, pertaining to, or of the nature of a preposition.
   • Although we have concentrated on Prepositions which take zero Complements, NP Complements, or clausal Complements in our discussion above, there seems no reason in principle to exclude the possibility of Prepositions taking prepositional Complements. And it may well be that items such as those...1988, Andrew Radford, chapter 7, in Transformational grammar: a first course, Cambridge, UK: Cambridge University Press, page 364
2. Of the prepositional case.

See all 3 meanings of prepositional