English Reference

Word

length

US/ˈɫɛŋkθ/

UK/lˈɛŋθ/

Definitions

01physical measurement

A2 · Elementary Uncountable noun Mathematics

n. the distance from one end of something to the other.

n. the measurement of the longest dimension of an object or the distance between two points.

“The length of the table is two metres, so it should fit in the kitchen.”

“The architect carefully calculated the length of the structural beams to ensure they could span the entire width of the hall without central support.”

Antonyms

02duration of time

B1 · Intermediate Uncountable noun

n. the amount of time that something lasts.

n. the duration or period of time occupied by an event or state.

“The length of the movie was three hours, which felt a bit too long.”

“The total length of the internship is six months, providing students with sufficient time to gain meaningful professional experience.”

03a piece of material

B1 · Intermediate Countable noun

n. a piece of something long, like rope, wood, or cloth.

n. a specific piece or section of a material that is typically sold or measured by its long dimension.

“He cut a short length of rope to tie the gate shut.”

“The plumber replaced a damaged length of copper piping that had begun to leak behind the bathroom wall.”

04swimming pool distance

B1 · Intermediate Countable noun Sports

n. the distance from one end of a swimming pool to the other.

n. the distance from one end of a swimming pool to the other, used as a unit of measurement for exercise.

“She swims twenty lengths every morning before she goes to work.”

“After completing fifty lengths of the Olympic-sized pool, the athlete focused on improving his turn technique for the upcoming competition.”

Synonyms

lap

05racing distance

B2 · Upper Intermediate Countable noun Sports

n. the distance equal to the length of a horse or boat in a race.

n. a unit of measurement in racing equivalent to the length of the animal or vehicle being raced.

“The horse won the race by two lengths in a very exciting finish.”

“Despite a slow start, the rowing crew managed to pull ahead and win the regatta by a clear length.”

Collocations

Common phrases and expressions where native English speakers use the word “length” in context.

Verb

01. extend length

“They plan to extend the length of the runway to accommodate larger planes.”

verb + noun

02. increase length

“The coach decided to increase the length of the training session.”

verb + noun

03. length varies

“The length of the shadows varies depending on the time of day.”

noun + verb

04. measure length

“Please measure the length of the table before buying the cloth.”

verb + noun

Adjective

05. average length

“The average length of the film is about two hours.”

adj + noun

06. considerable length

“The report was of considerable length and took hours to read.”

adj + noun

07. entire length

“We walked the entire length of the beach before sunset.”

adj + noun

08. full length

“She looked at herself in the full length mirror.”

adj + noun

Noun

09. length of time

“The length of time you spend exercising is more important than the intensity.”

noun + prep + noun

10. at great length

“He discussed the new project at great length during the meeting.”

11. keep at arm's length

“She preferred to keep her colleagues at arm's length.”

12. run the length of

“A scar ran the length of his left arm.”

Etymology

From Middle English lengthe, from Old English lengþ, lengþu, from Proto-West Germanic langiþu, from Proto-Germanic langiþō, equivalent to long + -th (abstract nominal suffix). Cognate with Scots lenth, lainth (“length”), Saterland Frisian Loangte (“length”), West Frisian lingte, langte (“length”), Dutch lengte (“length”), German Low German Längde, Längd, Längte, Längt (“length”), Danish længde (“length”), Swedish längd (“length”), Icelandic lengd (“length”).

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

Word family

NOUN

length(B1)

Idioms

Domains

MathematicsTheater

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
Common
Level
B1 · IntermediateOxford
Updated

QR code

englishreference.com/q/length

English Reference