The meaning of MOSTLY is for the greatest part : mainly. How to use mostly in a sentence.

In the smaller towns, it's mostly (= usually) very quiet at nights. The band is mostly (= most of them are) teenagers.

MOSTLY definition: for the most most much part; in the main. See examples of mostly used in a sentence.

/ˈmoʊstli/ /ˈmʌʊstli/ IPA guide Definitions of mostly adverb in large part; mainly or chiefly synonyms: for the most part, largely

WordReference Random House Unabridged Dictionary of American English © 2025 most•ly (mōst′ lē), adv. for the most part; in the main: The work is mostly done. chiefly; principally. generally; customarily.

Definition of mostly adverb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

mostly (ˈməʊstlɪ) adv 1. almost entirely; chiefly 2. on many or most occasions; usually

Mostly definition: For the greatest part; mainly.

There are three meanings listed in OED's entry for the adverb mostly, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

You use mostly to indicate that a statement is generally true, for example true about the majority of a group of things or people, true most of the time, or true in most respects.