What does probable mean?
Probable is an adjective meaning likely to happen or be true. It expresses a judgment based on available evidence or reasoning: something is more probable than not, but it is not certain. The word is used in everyday discussion, formal writing, and legal language, where “probable cause” refers to reasonable grounds for suspecting wrongdoing or otherwise justifying official action. “Probable” is generally more confident than “possible,” which leaves the outcome open, but less definite than “certain.” Its useful middle position makes it valuable when discussing forecasts, explanations, risks, and expectations without overstating the evidence. Although the word is related etymologically to “prove,” its modern meaning does not require proof; it instead indicates a conclusion supported by strong likelihood.
adjectiveLikely to happen or be true; more probable than not. In legal contexts, it means supported by reasonable grounds or evidence.
- Likely to happen or be true; more probable than not.
- Supported by reasonable grounds or evidence, especially in legal usage.
"A clear change in the weather is probable before the weekend."
"It is probable that the train will be delayed by the weather."
"The officer had probable cause to suspect that the vehicle had been stolen."
“Probable” comes from the same Latin root as “prove”: both ultimately reflect the idea of testing or making something evident.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does probable come from?
The adjective “probable” comes through French from Latin probabilis, meaning believable or likely. The Latin word was based on probare, “to test, examine, or approve,” the same root found in “prove.” The English word has long been used for things regarded as likely, with the legal sense of being supported by sufficient evidence developing in the modern period.
Related word forms
How probable is actually used
Common in formal and neutral contexts. It is often used before a noun, as in “a probable explanation,” and is less emphatic than “certain” but stronger than “possible.”
Easily confused with probable
“Probable” describes something that is more likely than not, while “possible” describes something that may happen but is not necessarily expected.