English Reference

Word

lax

US/ˈɫæks/

UK/lˈæks/

Definitions

01not strict

B2 · Upper Intermediate

adj. not strict or careful enough about rules or standards.

adj. lenient and allowing for deviation from established rules or standards; lacking in rigour.

“The security at the stadium was very lax, so people were bringing in their own drinks.”

“The company's lax attitude toward safety regulations eventually led to a series of avoidable accidents and a heavy fine from the government.”

02loose

C1 · Advanced Formal

adj. not firm, tight, or tense.

adj. lacking in firmness, tension, or tightness; physically loose.

“The doctor noticed that the patient had lax muscles in his lower back.”

“The rope became lax as the weight was lowered to the ground, losing the tension it had held throughout the climb.”

Antonyms

03linguistics

C2 · Proficiency Science Technical

adj. used to describe vowel sounds made with relaxed throat muscles.

adj. produced with relatively little muscular tension and less constriction of the vocal tract compared to tense vowels.

“The short 'i' sound in 'bit' is a lax vowel.”

“Phoneticists distinguish between tense and lax vowels based on the degree of muscular effort required during articulation.”

Synonyms

Antonyms

04laxative

C1 · Advanced Countable noun Medicine Informal · Technical

n. a short word for a medicine that helps you go to the toilet.

n. an informal clipping of laxative, referring to a substance used to stimulate bowel movements.

“The patient was advised to stop taking the lax once their digestion returned to normal.”

“Over-reliance on a strong lax can lead to long-term digestive issues if not monitored by a healthcare professional.”

Synonyms

purgative

Etymology

From the IATA airport code.

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

Word family

ADJECTIVE

lax(B1)

Domains

LinguisticsMathematics

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.B1 PreliminaryIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.4.0–5.0TOEFL 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: 3.0–3.544–71TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.550–784
Frequency
Frequent
Level
B1 · Intermediate
Updated

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English Reference