What does defined mean?
'Defined' is the past tense and past participle of the verb 'define', meaning that the meaning, nature, or boundaries of something have been explicitly stated or established. When a contract has defined the parties' obligations, those obligations are set out precisely and leave little room for dispute. The word also functions as an adjective describing anything with clear, distinct outlines — sharply defined muscles, a defined jawline, or a well-defined strategy. Its connotations are ones of clarity, precision, and authority: what is defined has been settled, measured, or agreed upon, standing in contrast to what remains vague or open-ended. The word derives from the Latin definire, 'to fix the limits of', from finis, meaning boundary or end — so at its root, to define something is quite literally to draw a line around it. This makes 'defined' a valuable word in legal, technical, scientific, and everyday contexts where precision matters.
Past tense and past participle of 'define': stated or explained the precise meaning of something; determined or fixed its limits, extent, or character.
"The founders defined the organization's mission in its charter."
Most often used in the passive voice ('was defined') or with subjects like rules, terms, laws, and roles.
Clearly marked out, distinct in outline or character; not vague or blurred.
"The mountain ridge stood sharply defined against the evening sky."
Usually modified by an adverb such as 'clearly', 'sharply', 'well', or 'poorly'.
The word 'define' comes from Latin de-finire — literally 'to set the limits' — so when something is defined, its boundaries have literally been drawn.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of defined
The verb 'define' entered English from Old French 'definer', borrowed from the Latin definire, formed from de- ('down, completely') plus finire ('to limit, set bounds'), itself from finis ('boundary, end'). It was first attested in English in the late Middle English period, carrying both the sense of stating a meaning precisely and of marking out limits. Cognates and relatives sharing the same Latin root include 'finite', 'infinite', 'finish', and 'definitive', all preserving the underlying idea of boundaries or endpoints.
Related word forms
How defined is actually used
When used adjectivally, 'defined' typically appears with intensifying modifiers such as 'clearly', 'sharply', 'poorly', or 'well' — a bare 'defined edges' sounds unusual compared to 'sharply defined edges'. In formal and legal writing, 'as defined in Section 4' is a standard way to point readers to an authoritative explanation.
Easily confused with defined
'Defined' means clearly stated or marked out, while 'refined' means made more elegant, pure, or polished.