different between imaginary vs indefinite

English

Etymology

From Middle French imaginaire, from Latin im?gin?rius (“relating to images, fancied”), from im?g?.

The mathematical sense derives from René Descartes's use (of the French imaginaire) in 1637, La Geometrie, to ridicule the notion of regarding non-real roots of polynomials as numbers. Although Descartes' usage was derogatory, the designation stuck even after the concept gained acceptance in the 18th century.

Pronunciation

• (Received Pronunciation) IPA^(key): /??mæd??n(?)?i/
• (General American) IPA^(key): /??mæd???n??i/

Adjective

imaginary (comparative more imaginary, superlative most imaginary)

1. Existing only in the imagination.

   • Wilt thou add to all the griefs I suffer / Imaginary ills and fancied tortures?

2. (mathematics, of a number) Having no real part; that part of a complex number which is a multiple of ${\displaystyle {\sqrt {-1}}}$ (called imaginary unit).

Synonyms

• (existing only in the imagination): all in one's head

Derived terms

• imaginarily
• imaginariness
• imaginarity
• imaginary number
• imaginary unit

Translations

Noun

imaginary (plural imaginaries)

1. Imagination; fancy. [from 16th c.]
   • 2002, Colin Jones, The Great Nation, Penguin 2003, p. 324:

     By then too Mozart's opera, from Da Ponte's libretto, had made Figaro a stock character in the European imaginary and set the whole Continent whistling Mozartian airs and chuckling at Figaresque humour.
2. (mathematics) An imaginary quantity. [from 18th c.]
3. (sociology) The set of values, institutions, laws, and symbols common to a particular social group and the corresponding society through which people imagine their social whole.

References

English

Etymology

From Late Latin ind?f?n?tus.

Pronunciation

• IPA^(key): /?n?d?f?n?t/
• Hyphenation: in?def?i?nite

Adjective

indefinite (comparative more indefinite, superlative most indefinite)

1. Without limit; forever, or until further notice; not definite.
2. Vague or unclear.
3. Undecided or uncertain.
4. (mathematics) Being an integral without specified limits.
5. (linguistics) Designating an unspecified or unidentified person or thing or group of persons or things

   the indefinite article

Synonyms

• (without limit): unlimited, unrestricted
• (vague or unclear): hazy; see also Thesaurus:indistinct or Thesaurus:vague
• (undecided or uncertain): indeterminate, unsettled, indecisive, unsure
• (an integral without specified limits):
• (designating an unspecified thing):

Derived terms

• indefinitely
• indefinite article
• indefiniteness
• indef

Related terms

• indeterminate

Translations

Noun

indefinite (plural indefinites)

1. (grammar) A word or phrase that designates an unspecified or unidentified person or thing or group of persons or things.

Italian

Adjective

indefinite f pl

1. feminine plural of indefinito

Latin

Adjective

ind?f?n?te

1. vocative masculine singular of ind?f?n?tus

References

• indefinite in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• indefinite in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette