What does evidence mean?
Evidence is the body of facts, information, or physical traces that shows whether something is true, likely, or real. It is central to science, law, journalism, and everyday reasoning: scientists cite experimental evidence, lawyers present evidence to juries, and we all weigh everyday evidence before forming conclusions. Grammatically, evidence is uncountable in modern English, so we speak of 'pieces of evidence' or simply 'more evidence.' Its connotations lean formal and rigorous — invoking evidence suggests careful, objective judgment rather than mere opinion. The word derives from Latin videre, 'to see': literally, that which makes things visible to understanding. Related words such as evident ('clearly seen') and provide share this visual root, reminding us that at its heart, evidence is what allows us to truly see a situation.
The available facts, information, or signs indicating whether a belief, claim, or proposition is true.
"The committee reviewed all the evidence before reaching a verdict."
Uncountable in standard usage; quantify as 'a piece of evidence' or 'items of evidence.'
(Law) Testimony, documents, or physical objects formally presented in court to prove or disprove a fact.
"The defense argued that the evidence had been mishandled."
Evidence has no plural form in standard modern English; use 'pieces of evidence' or rephrase to convey quantity.
"Several pieces of evidence pointed to the same conclusion."
In court, evidence can be 'inadmissible' — meaning the truth itself may be legally forbidden from being heard.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of evidence
Evidence comes from the Latin evidens (genitive evidentis), meaning 'plain, clear, obvious,' formed from ex- ('out of') plus videre ('to see') — so etymologically it is 'that which is plainly seen.' English borrowed it via Old French in the Middle Ages, with its legal sense established by the late medieval period and its broader sense of supporting facts developing later. Cognates sharing the videre root include evident, provide, vision, and view.
Related word forms
How evidence is actually used
Evidence is an uncountable noun in standard English — you say 'a piece of evidence,' never 'an evidence' or 'evidences' (except in rare legal/archaic contexts). The word carries a formal, often legal or scientific register.
Easily confused with evidence
"Evidents" is not a standard English word — the noun is always uncountable "evidence," while "evident" is the adjective meaning clearly apparent.