English Reference

Word

plethora

Phoneticspletho·ra

US/ˈpɫɛθɝə/

UK/plˈɛθəɹɐ/

Definitions

01a large amount

C1 · Advanced Countable noun Academic · Formal

n. a very large amount of something, especially more than you need.

n. an excessive amount or number; an abundance that may feel overwhelming.

“The website offers a plethora of information, which can be a bit confusing.”

“The report cited a plethora of reasons for the project's failure, ranging from poor budget management to a lack of clear leadership.”

Synonyms

02excess of blood

C2 · Proficiency Uncountable noun Medicine Technical

n. a medical condition where there is too much blood in the body or a specific area, like the face.

n. a bodily condition characterized by an excess of blood or other fluids; often manifests as a reddish complexion.

“The doctor noticed a plethora in the patient's face, suggesting high blood pressure.”

“Clinical observation revealed a marked plethora, indicating a significant increase in total blood volume that required immediate diagnostic attention.”

Synonyms

hyperemiacongestion

Antonyms

Usage

Usually followed by the preposition 'of'. While historically meaning an unhealthy excess, it is now commonly used as a synonym for 'a wide variety'.

Pitfall

a plethora of many options

a plethora of options

Plethora already implies a large number; adding 'many' is redundant.

Real-World Examples

“These surveys yielded a plethora of astronomical discoveries, including that the universe is expanding.”
The Conversation 27 Aug 2026
“Over the past year, we’ve seen a plethora of new announcements in a category labeled “world models,” and you’ll likely see more movement there in the coming months and years.”
Ars Technica 13 Jul 2026

Etymology

From Late Latin plēthōra, from Ancient Greek πληθώρη (plēthṓrē, “fullness, satiety”), from πλήθω (plḗthō, “to be full”) + -η (-ē, nominal suffix).

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

Related words

Domain

Medicine

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.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL 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: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · Advanced
Updated

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English Reference