1. A word usually put before a noun or a pronoun to show its relation to another word in the sentence.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• perposition,
• preporsition,
• proprosition,
• prepisition,
• preposistion,
• preparition,
• propisition,
• proposistion,
• repostion,
• propostition,
• prepostion,
• repossition,
• propasition,
• prepostions,
• prepositons,
• repoisition,
• prosition,
• propostion,
• presition,
• propossition

• profusion,
• propagation,
• prepossession,
• proboscidian,
• proboscidean,
• proboscis,
• prepossess,
• prevision,
• prepositional,
• provision,
• proposition,
• propositus,
• preposterous,
• prepossessing.

The adjective form of the word "preposition" is "prepositional".

The plural of the "preposition" can be the "prepositions".

The singular of the "preposition" can be the "preposition".