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Definition of reliable

reliable

/ɹɪˈlaɪ.ə.bəl/
re · li · a · ble
Adverb:reliably
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reliable Lexical Profile

reliable Game Scores & Validity

• adjective

1

Consistently good in quality or performance; able to be trusted or depended on.

Example

"She is a reliable team member who always completes her assignments ahead of schedule."

2

Likely to be true or accurate; yielding consistent results across repeated measurements or observations (of information, data, or a source).

Example

"Researchers must verify that their historical sources are reliable before publishing their conclusions."

Synonyms
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Antonyms
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• Rhymes for reliable

• Nearby Words

relevant
relevantly
reliability
reliable
reliably
reliance
reliant

Word Origin & Etymology

First attested in the mid-16th century in Scottish English as 'relyable', formed from the verb 'rely' (from Old French 'relier', meaning to bind or fasten together, from Latin 'religare') plus the suffix '-able'.

Cite this Entry

Wordmom. (2026). Definition of Reliable. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/reliable
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