English Reference

Word

runtime

Phoneticsrun·time

Definitions

01computing execution time

B2 · Upper Intermediate Uncountable noun Computing Technical

n. the time when a computer program is actually working or running.

n. the period during which a computer program is executing, as opposed to other phases of the software lifecycle like compile time.

“The app crashed at runtime because it couldn't find the database.”

“The developers spent weeks optimizing the code to reduce runtime errors and improve the overall efficiency of the server-side processing.”

Usage

Often used as a compound noun or as an adjective modifying 'error' or 'environment'.

Synonyms

execution time

02duration of a film

B2 · Upper Intermediate Countable noun Theater

n. the total length of time a movie, play, or piece of music lasts.

n. the total duration of a film, theatrical performance, or recorded media from start to finish.

“The movie has a runtime of three hours, so we should buy snacks.”

“Despite its lengthy runtime, the documentary maintains a brisk pace that keeps the audience engaged through every historical reenactment.”

Synonyms

Domain

Programming

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.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL 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: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Occasional
Level
B2 · Upper Intermediate
Updated

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English Reference