English Reference

Word

rearrangement

Phoneticsre·arrange·ment

US/ɹiɝˈeɪndʒmənt/

UK/ɹˌiːɐɹˈeɪndʒmənt/

Countable & uncountable

Definition

n. a chemical reaction where the atoms in a molecule move around to form a different structure. The same atoms are still there, but their order has changed.

n. a chemical reaction in which the structure of a molecule is altered without changing its molecular formula. Often involves the migration of atoms or groups within the molecule.

Examples

“The acid catalyzed the rearrangement of the double bond.”

“During the heating process, the compound underwent a structural rearrangement that increased its stability.”

“The study focused on the thermal rearrangement of the starting material, which eventually led to the formation of a more complex and biologically active product.”

Examples

simple

“The acid catalyzed the rearrangement of the double bond.”

contextual

“During the heating process, the compound underwent a structural rearrangement that increased its stability.”

complex

“The study focused on the thermal rearrangement of the starting material, which eventually led to the formation of a more complex and biologically active product.”

Real-World Examples

“The study attributes the change to energy from the shock and structural rearrangements that turn diamond into graphite.”
Phys.org 20 Aug 2026
“The particles suddenly organize into a shear band: a thin plane of intense rearrangement slicing across the whole sample, with a sudden drop in stress.”
Phys.org 16 Aug 2026

Word family

NOUN

rearrangement(C1)

Domain

Chemistry

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
Occasional
Level
C1 · Advanced
Updated

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English Reference