preposition
🇺🇸
/ˌprepəˈzɪʃn/
🇬🇧
/ˌprepəˈzɪʃn/
A word that shows where, when, or how something is related to something else, like 'in', 'on', or 'at'.
The word 'on' is a preposition that tells where the book is placed.