What does decided mean?
Decided functions primarily as an adjective meaning clear, definite, and unmistakable — as when someone shows a decided preference for one option over another, or when there is a decided improvement in conditions. It can also describe a person who is firm and resolute, holding their views without wavering. In addition, 'decided' serves as the past tense and past participle of the verb 'decide', indicating that a conclusion has been reached or a choice made after deliberation. The word derives from the Latin decidere, literally 'to cut off', which conveys the sense of severing alternatives until only one remains — a fitting image for the definiteness the adjective now expresses. In everyday usage, 'decided' lends emphasis: calling something a decided advantage asserts that its benefit is not marginal but plainly evident. It sits comfortably in formal writing, journalism, and speech alike, offering writers a precise way to signal certainty, clarity, or firmness of purpose without resorting to stronger or more emotive language.
Clear, definite, and unmistakable; or (of a person) firm and resolute in opinion or action.
"The new policy had a decided effect on attendance figures."
Usually used attributively before a noun; slightly formal in register.
Past tense and past participle of 'decide': to have reached a conclusion, judgment, or choice after consideration.
"They decided to move to the coast after years of city living."
When you call something 'decided', you're literally saying it has been 'cut off' from all other possibilities — the Latin root caedere means to cut.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of decided
Decided comes from the Latin decidere, formed from de- ('off, away') plus caedere ('to cut'), originally meaning to cut off or settle. The verb passed into English via Old French decider in the late Middle English period, and the adjectival sense of 'definite, unmistakable' developed by the 17th century. It shares its root with decisive, decision, and incision, all tracing back to the Latin caedere.
Related word forms
How decided is actually used
'Decided' as an adjective typically appears attributively before a noun ('a decided advantage') rather than predicatively. It carries a slightly formal register compared with simpler alternatives like 'clear' or 'obvious'. When used of people it implies firmness of character, often approvingly but occasionally with a hint of stubbornness depending on context.
Easily confused with decided
'Decided' means definite or unmistakable, while 'decisive' describes something that settles an issue conclusively, or a person able to make decisions quickly and firmly.