preposition

1. (grammar, 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.Examples: "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."; "And in (121) below, we see that when a wh-NP is used as the Object of a Preposition, the whole Prepositional Phrase can undergo WH MOVEMENT: (121) (a) [To whom] can I send this letter —? (121) (b) [About what] are they quarrelling —? (121) (c) [In which book] did you read about it —?"; "I love this girl. “On which I can get my hands” — even in her darkest moment, she cannot bring herself to end a sentence with a preposition."strict-sense

2. (grammar, broad sense) An adposition.broadly

3. (obsolete) A proposition; an exposition; a discourse.Examples: "[…] he made a longe preposicion & oracion cōcernynge yͤ allegiaūce which he exortyd his lordes to owe"obsolete