English Reference

Word

mostly

Phoneticsmost·ly, stress on the first syllable

US/ˈmoʊsɫi/

UK/mˈəʊstli/

Adverb of degree

Definition

adv. for the most part, or in most cases.

adv. chiefly or principally; used to indicate that a situation or quality applies to the majority of a group or time.

Examples

“The crowd at the concert is mostly teenagers.”

“The weather this week will be mostly sunny, though we might see a few clouds on Thursday afternoon.”

“While the report addresses several minor administrative errors, it is mostly concerned with the systemic failure of the communication protocols during the emergency response.”

Examples

simple

“The crowd at the concert is mostly teenagers.”

contextual

“The weather this week will be mostly sunny, though we might see a few clouds on Thursday afternoon.”

complex

“While the report addresses several minor administrative errors, it is mostly concerned with the systemic failure of the communication protocols during the emergency response.”

Usage

Typically placed before the adjective, adverb, or phrase it modifies, or after the verb 'to be'.

Confusables

mostly vs most

Most functions as a determiner or pronoun to indicate the majority of a group, while mostly is an adverb meaning mainly or generally.

RememberMost = Quantity. Mostly = Frequency or Quality.

Etymology

From most + -ly.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Synonyms

Antonyms

Word family

ADVERB

mostly(A2)

DETERMINER

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A2 KeyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.3.0–4.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 2.0–2.524–43TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.225–549
Frequency
Very common
Level
A2 · ElementaryOxford
Updated

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