Word
reliability
Phoneticsre·li·a·bil·i·ty, stress on the fourth syllable
US/ɹiˌɫaɪəˈbɪɫəti/
UK/ɹɪlˌaɪəbˈɪlɪti/
Definitions
01trustworthiness
B2 · Upper Intermediate Uncountable noun
n. the quality of being able to be trusted or relied on.
n. the quality of being dependable, consistent, or trustworthy in character or performance.
日本語:信頼性※
Español:fiabilidad
“The company is famous for the reliability of its cars, which rarely break down.”
“The manager questioned the reliability of the witness's testimony after several inconsistencies were discovered during the cross-examination.”
Usage
Uncountable in general usage.
Synonyms
Antonyms
02consistency of measurement
C1 · Advanced Uncountable noun Science Academic · Technical
n. the ability of a test or tool to give the same result every time you use it.
n. the degree to which an assessment tool produces stable and consistent results over repeated trials.
日本語:信頼性※
“The researchers checked the reliability of the survey by giving it to the same group twice.”
“High reliability does not necessarily imply validity; a scale might consistently overstate weight by five kilograms, making it reliable but inaccurate.”
Usage
Often contrasted with 'validity' in research contexts.
Synonyms
Antonyms
03technical performance
C1 · Advanced Uncountable noun Science Technical
n. how long a machine or system works before it fails or breaks.
n. the probability that a system or component will perform its required function under stated conditions for a specified period.
日本語:信頼性※
“Engineers are working to improve the reliability of the new power grid.”
“The aerospace industry demands extreme levels of reliability, as even a minor component failure can have catastrophic consequences during flight.”
Usage
Commonly used in engineering and systems design.
Synonyms
Antonyms
Collocations
Common phrases and expressions where native English speakers use the word “reliability” in context.
Verb
01. ensure reliability
“Rigorous testing is conducted to ensure reliability before the product is launched.”
verb + noun
02. establish reliability
“Researchers must establish reliability in their findings through repeated trials.”
verb + noun
03. increase reliability
“Upgrading the hardware will significantly increase reliability for all users.”
verb + noun
Adjective
04. internal reliability
“The survey showed high internal reliability, meaning the questions were consistent.”
adj + noun
05. reliability assess
Real-World Examples
“Such systems could reduce communication and energy constraints at the lunar poles, but long-duration reliability, navigation in shadowed terrain, dust tolerance and interoperability remain unresolved.” “Texas’ policies have prioritized gas and battery plant construction to help bolster the power grid’s reliability at times of high demand.” “The price is a major drawback, but his combination of reliability, captaincy potential and fixture quality makes him an excellent pick.” Etymology
From reliable + -ity.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
NOUN
ADJECTIVE
ADVERB
Domains
- 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
- Frequent
- Level
- C1 · AdvancedOxford
- Updated
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QR code
englishreference.com/q/reliability
※ 機械で選んだ訳語です。ネイティブスピーカーによる確認はまだです。
「日本語」 data: JMdict (EDRDG), CC BY-SA 4.0
Traducciones: Kaikki.org (Wiktionary), CC BY-SA 4.0