What does cert mean?
"Cert" is an informal British and Australian abbreviation of "certainty," used as a noun to describe something regarded as absolutely assured — a result, outcome, or person whose success is beyond reasonable doubt. A horse heavily fancied to win a race, a candidate guaranteed election, or an event everyone knows will happen can all be described as a cert, often intensified in the fixed phrase "dead cert." The word carries a confident, colloquial tone: it belongs to the register of sports commentary, punting, and everyday banter rather than formal prose, where writers would choose "certainty" or "foregone conclusion." Though firmly rooted in British and Australian usage, it is widely understood across English-speaking countries. Compact and emphatic, "cert" delivers more punch than its full-length parent word, which is precisely why speakers reach for it when they want to signal total conviction with minimal fuss.
nounAn informal shortening of "certainty," meaning something or someone that is sure to happen or succeed; a foregone conclusion.
- Something or someone that is certain to happen, succeed, or win; a foregone conclusion.
"With their lead at three goals, the win was a cert."
"Everyone agreed she was a cert for the promotion."
"Back the favourite — it's a dead cert, according to the pundits."
The plural is straightforward and used when referring to multiple sure things.
"The bookmaker refused bets on what he considered certs."
In betting circles, the strongest possible tip isn't called a lock — in Britain it's a "dead cert," and no bookmaker ever wants to hear it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cert
"Cert" arose in the late nineteenth or early twentieth century as a colloquial clipping of "certainty," first in British English and becoming especially established in Australia. Its root ultimately traces to Latin "certus," meaning settled, resolved, or sure, the same source that gives English "certain," "certify," and "ascertain." The clipped form reflects a common English pattern of trimming longer abstract nouns for informal use.
How cert is actually used
"Cert" is distinctly informal and colloquial, most at home in British and Australian speech, especially in contexts of betting, sport, and prediction. It is rarely used in formal writing, where "certainty" is preferred.
Easily confused with cert
"Carte" refers to a menu or chart (as in à la carte) and is pronounced differently, while "cert" is an informal noun for a certainty.