What is a preoposition?

Answer 1

noun, Grammar. 1. any member of a class of words found in many languages that are used before nouns, pronouns, or other substantives to form phrases functioning as modifiers of verbs, nouns, or adjectives, and that typically express a spatial, temporal, or other relationship, as in, on, by, to, since.

Answer 2

A preposition is a word or phrase that typically comes before a noun or pronoun and shows its relationship to another word in the sentence. It usually indicates location, direction, time, or manner. Examples of prepositions include "in," "on," "at," "from," and "to."