well-defined

adjective

Having a clean and distinct outline.

Opposite

Meanings

adjectivewell-defined (comparative better-defined or more well-defined, superlative best-defined or most well-defined)

comparative better-defined · comparative more well-defined · superlative best-defined · superlative most well-defined

  1. Having a clean and distinct outline.

    Antonyms: ill-defined

  2. Accurately and precisely described or specified.
    1 more example

    AMVAC Chemical Corp. spokesman Brian Maddox said the company does not sell naled into China and has “no idea how it may have been used or how much is applied. By contrast, the application of Naled in the US is well-defined by the USEPA label and is highly controlled to ensure compliance with rigorous US standards.”

    2017 June 9, Susan Scutti, “Study links mosquito spray to delayed motor skills in babies”, in CNN, archived from the original on 06 Oct 2022
  3. mathematicsDefined in an unambiguous and consistent way: specifically, such that any two objects implied to be identical are indeed identical.

    Antonyms: ill-defined

Synonyms & antonyms

adjectiveHaving a clean and distinct outline.

Opposite

adjectiveDefined in an unambiguous and consistent way: specifically, such that any two objects implied to be identical are indeed identical.

Opposite

More synonyms by meaning

adjectivehaving a clean and distinct outline as if precisely cut along the edges

adjectiveaccurately stated or described

Similar
Opposite

Synonym sets from Open English WordNet, CC BY 4.0.

Translations

Danish veldefineret, veldefineret
  • veldefineretaccurately and precisely described or specified
  • veldefineretmathematics: defined unambiguously and consistently
Finnish selväpiirteinen, tarkkarajainen
  • selväpiirteinenhaving a clean and distinct outline
  • tarkkarajainenhaving a clean and distinct outline
  • hyvin määriteltyaccurately and precisely described or specified
  • tarkoin määriteltyaccurately and precisely described or specified
  • tarkasti määriteltyaccurately and precisely described or specified
  • hyvin määriteltymathematics: defined unambiguously and consistently
German wohldefiniert
  • wohldefiniertmathematics: defined unambiguously and consistently
Italian ben definito
  • ben definitomathematics: defined unambiguously and consistently
Norwegian Bokmål veldefinert
  • veldefinertaccurately and precisely described or specified
Romanian bine definit
  • bine definitmathematics: defined unambiguously and consistently
Russian чёткий, стро́го очерченный
  • чёткий (čótkij)having a clean and distinct outline
  • стро́го очерченный (strógo očerčennyj)having a clean and distinct outline
  • чёткий (čótkij)accurately and precisely described or specified
  • определённый (opredeljónnyj)accurately and precisely described or specified
  • стро́го очерченный (strógo očerčennyj)accurately and precisely described or specified
  • чётко определённый (čótko opredeljónnyj)accurately and precisely described or specified
  • однозначный (odnoznačnyj)mathematics: defined unambiguously and consistently
Cite this entry
APA

well-defined. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/well-defined

MLA

“well-defined.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/well-defined. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “well-defined,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/well-defined.

Source: well-defined on Wiktionary, CC BY-SA 4.0.