English Reference

Word

randomness

Phoneticsran·dom·ness, stress on the first syllable

US/ˈɹændəmnəs/

UK/ɹˈændəmnəs/

Definition

n. the quality of being without any pattern or order. You use this to describe things that happen by chance rather than by a plan.

n. the quality of being without any pattern, plan, or predictability. Often used to describe the lack of correlation between events or the absence of a systematic cause.

Examples

“The lottery is based on pure randomness.”

“The scientist noticed that the data showed no randomness and suggested a hidden pattern might be at work.”

“In probability theory, the concept of randomness is essential for defining events that cannot be predicted with certainty, even if all initial conditions are known.”

Examples

simple

“The lottery is based on pure randomness.”

contextual

“The scientist noticed that the data showed no randomness and suggested a hidden pattern might be at work.”

complex

“In probability theory, the concept of randomness is essential for defining events that cannot be predicted with certainty, even if all initial conditions are known.”

Real-World Examples

“The design shown in this study preserves the advantages of these qubits while using levitation to remove the randomness of a bumpy surface.”
Phys.org 20 Aug 2026

Etymology

From random + -ness.

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

Word family

NOUN

randomness(B2)

ADJECTIVE

Domain

Mathematics

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

QR code

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English Reference