A preposition is a word that shows the relationship between a noun or pronoun and other words in a sentence. Learning prepositions in English grammar is essential for clear communication and success in school and competitive exams. This topic explains types, lists, examples, and usage tips for mastering prepositions . What is a Preposition ? PREPOSITION definition : 1. in grammar, a word that is used before a noun, a noun phrase, or a pronoun, connecting it to…. Learn more. A preposition is a part of speech that connects a noun, pronoun, or phrase to other words in a sentence . It helps show relationships like direction, place, time, reason, or how something happens. What is a Preposition? A preposition is a word that shows the relationship between a noun or pronoun and other parts of a sentence . It tells us where something is, when something happens, or how things are related. Common prepositions include words like "in," "on," "at," "under," and "with."