English Reference

Word

boiling

Phoneticsboil·ing, stress on the first syllable

US/ˈbɔɪɫɪŋ/

UK/bˈɔɪlɪŋ/

Definitions

01extremely hot weather

A2 · Elementary Informal

adj. used to describe weather or a room that is uncomfortably hot.

adj. denoting weather or ambient conditions of extreme heat. Informal in register when used as a synonym for 'very hot'.

“Can we open a window? It is boiling in this office.”

“The commuters huddled under the few patches of shade available on the platform, complaining that the afternoon was absolutely boiling.”

Usage

Often used with 'absolutely' rather than 'very' because it is an ungradable adjective.

Pitfall

It is very boiling today.

It is absolutely boiling today.

Boiling is an 'extreme' adjective. Use 'absolutely' or 'completely' instead of 'very' to add emphasis.

Synonyms

scorchingswelteringroasting

Antonyms

02at boiling point

B1 · Intermediate Science

adj. liquid that has reached the temperature where it turns into steam.

adj. referring to a liquid that has reached its boiling point and is actively bubbling and vaporising.

“Be careful with that boiling water when you make the tea.”

“The recipe requires you to pour the boiling liquid over the dried fruit and let it steep for at least twenty minutes.”

Synonyms

Antonyms

03the process of heating

B2 · Upper Intermediate Uncountable noun Science

n. the process of heating a liquid until it bubbles and turns to gas.

n. the physical process of rapid vaporisation of a liquid, typically occurring when it is heated to its boiling point.

“The boiling of the water took longer than usual because of the high altitude.”

“The rapid boiling of the solvent ensured that the impurities were carried away in the steam, leaving the purified compound behind.”

Synonyms

vaporisationebullition

04extremely

B1 · Intermediate Informal

adv. used before 'hot' to mean extremely hot.

adv. an intensifier used exclusively with the adjective 'hot'.

“The soup was boiling hot, so I had to wait a few minutes to eat it.”

“After hiking all day in the sun, the trekkers were grateful for a dip in the lake, even though the air remained boiling hot.”

Usage

Almost exclusively found in the collocation 'boiling hot'.

Etymology

From boil + -ing.

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

Idioms

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.A2 KeyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.3.0–4.0TOEFL 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: 2.0–2.524–43TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.225–549
Frequency
Frequent
Level
A2 · Elementary
Updated

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English Reference