English Reference

Word

assimilation

Phoneticsas·sim·i·la·tion, stress on the fourth syllable

US/əˌsɪməˈɫeɪʃən/

UK/ɐsˌɪmɪlˈeɪʃən/

Definitions

01cultural/social integration

C1 · Advanced Uncountable noun Academic

n. the process where a person or group becomes part of a different society by adopting its customs and language.

n. the sociological process by which a minority group or individual gradually adopts the customs and attitudes of the prevailing culture.

“The government created new programs to help with the assimilation of immigrants into the local community.”

“Sociologists debate whether full cultural assimilation is a necessary prerequisite for social stability or if pluralism offers a more sustainable model.”

Usage

Often used with the preposition 'into'.

Synonyms

02learning information

C1 · Advanced Uncountable noun Academic

n. the act of fully understanding and absorbing new ideas or information.

n. the cognitive process of absorbing new information into an existing mental framework or schema.

“The quick assimilation of new technology is essential for success in the modern workplace.”

“The curriculum is designed to allow for the gradual assimilation of complex mathematical concepts over several semesters.”

03biology/nutrition

C2 · Proficiency Uncountable noun Science Technical

n. the way your body turns food into energy or new tissue.

n. the metabolic conversion of nutrients from food into the fluid or solid substances of the body.

“Poor assimilation of vitamins can lead to health problems even if you eat well.”

“The study examined how certain enzymes facilitate the assimilation of nitrogen in various plant species.”

04linguistics/speech

C2 · Proficiency Countable noun Science Technical

n. when a sound in a word changes to sound more like a nearby sound.

n. a phonological process where a speech sound becomes similar or identical to a neighbouring sound.

“In the word 'handbag', the 'n' often sounds like an 'm' because of assimilation.”

“Regressive assimilation occurs when a following sound influences the articulation of the preceding phoneme, as seen in many rapid-speech phenomena.”

Synonyms

sound change

Real-World Examples

“If anything, the fact that centuries-old rituals coexist with sweet Italian sausages and big, floppy pizza slices speaks to a lengthy, strenuous and beautiful process of cultural assimilation.”
The Conversation 17 Sept 2026
“Roger was the British coordinator of a unique comparative international study of migrants in Britain, France and Germany, which examined processes of assimilation.”
The Guardian 2 Sept 2026

Etymology

Borrowed from Medieval Latin assimilatio. By surface analysis, assimilate + -ion.

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

Word family

NOUN

assimilation(C1)

Domain

Sociology

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