English Reference

Word

hyperactivity

Phoneticshy·per·ac·tiv·i·ty, stress on the fourth syllable

US/ˌhaɪpɝækˈtɪvɪti/

UK/hˌaɪpəɹɐktˈɪvɪti/

Medicine

Definition

n. a state of being very active, energetic, or restless. It often describes a child who has a lot of energy and cannot sit still for long.

n. a state of excessive physical or mental activity, often characterized by restlessness and an inability to remain seated. Frequently used in clinical contexts to describe a neurodevelopmental condition.

Examples

“The doctor checked for signs of hyperactivity in the child.”

“The teacher noticed that the student's hyperactivity made it difficult for him to focus during quiet reading time.”

“While some children exhibit hyperactivity as a natural part of their development, persistent and severe symptoms may indicate a need for professional intervention to manage attention and behavior.”

Examples

simple

“The doctor checked for signs of hyperactivity in the child.”

contextual

“The teacher noticed that the student's hyperactivity made it difficult for him to focus during quiet reading time.”

complex

“While some children exhibit hyperactivity as a natural part of their development, persistent and severe symptoms may indicate a need for professional intervention to manage attention and behavior.”

Real-World Examples

“Her findings also suggest that multitasking during meetings may help ADHD attendees manage boredom or hyperactivity.”
Ars Technica 17 Oct 2026
“In addition, various rating scales are available to help quantify symptoms present that might indicate either inattention or hyperactivity.”
The Guardian 1 Mar 2025

Etymology

From hyper- + activity.

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

Word family

NOUN

hyperactivity(B2)

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.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL 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: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Occasional
Level
B2 · Upper Intermediate
Updated

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