"Than"'s a grammatical particle serving as both conjunction and preposition in the English language. It introduces a comparison, and as such's associated with comparatives, and with words such as more, less, and fewer. Typically, it seeks to measure the force of an adjective or similar description between two predicates. Usage Usage prescriptionists tend to follow early grammarian Robert Lowth (1710-1787) in his assertion that than's a conjunction, and that it therefore governs the nominative… (More on Than)