define — English Dictionary

define
Pronunciations (2)
  • /dɪˈfaɪn/
  • dɪˈfaɪn

Verb

  1. To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly.

    Examples

    the defining power of an optical instrument

    Rings[…]very distinct and well defined.

    More examples (1)

    Turbines have been around for a long time—windmills and water wheels are early examples. The name comes from the Latin turbo, meaning vortex, and thus the defining property of a turbine is that a fluid or gas turns the blades of a rotor, which is attached to a shaft that can perform useful work.

  2. To settle, decide (an argument etc.).

    Usage
    • Obsolete
    Examples

    These warlike Champions, all in armour shine, / Assembled were in field the chalenge to define.

  3. To express the essential nature of something.

    Examples

    I define myself as a techno-anarchist.

    Your past mistakes do not define who you are.

    More examples (1)

    Cantor defined a one-to-one correspondence between the points of the square and the points of the line segment. Every point in the square was associated with a single point in the segment; every point in the segment was matched with a unique point in the square.

  4. To state the meaning of a word, phrase, sign, or symbol.

    Examples

    The textbook defined speed as velocity divided by time.

  5. To describe, explain, or make definite and clear; used to request the listener or other person to elaborate or explain more clearly his or her intended meaning of a word or expression.

    Examples
    More examples (1)

    Person 1: Is she good at math? Person 2: Define "good." If you mean if she is faster than the average middle schooler at multiplication, then yes. If you mean if she is able to do multivariable calculus, then no.

  6. To demark sharply the outlines or limits of an area or concept.

    Examples

    to define the legal boundaries of a property

    More examples (2)

    Neither Marx nor Engels ever clearly defined the concept of class, and the last chapter of Volume III of Capital, which was to treat of this question, breaks off after three or four paragraphs.

    Few concepts are as emotionally charged as that of race. The word conjures up a mixture of associations—culture, ethnicity, genetics, subjugation, exclusion and persecution. But is the tragic history of efforts to define groups of people by race really a matter of the misuse of science, the abuse of a valid biological concept?

  7. To establish the referent of a term or notation.

Noun

  1. A kind of macro in source code that replaces one text string with another wherever it occurs.

    Examples
    More examples (2)

    From the computer programming perspective, Java looks like C and C++ while discarding the overwhelming complexities of those languages, such as typedefs, defines, preprocessor, unions, pointers, and multiple inheritance.

    Anyone who has attempted to do OO programming in a conventional language using defines will find out that it is impossible to realize the benefits easily, if at all, without compiler support.

Verb

  1. determine the essential quality of

  2. give a definition for the meaning of a word

    Examples

    Define ‘sadness’

  3. determine the nature of

    Examples

    What defines a good wine?

  4. show the form or outline of

    Synonyms
    Broader terms
    Examples

    The tree was clearly defined by the light

    The camera could define the smallest object

  5. decide upon or fix definitely

    Examples

    fix the variables

    specify the parameters

Word forms
definesdefiningdefineddefineddefines

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