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accurate

[ak-yer-it]
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adjective
  1. free from error or defect; consistent with a standard, rule, or model; precise; exact.
  2. careful or meticulous: an accurate typist.
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Origin of accurate

1605–15; < Latin accūrātus carefully prepared (past participle of accūrāre), equivalent to ac- ac- + cūr(a) care + -ātus -ate1
Related formsac·cu·rate·ly, adverbac·cu·rate·ness, nounhy·per·ac·cu·rate, adjectivehy·per·ac·cu·rate·ly, adverbhy·per·ac·cu·rate·ness, nounsu·per·ac·cu·rate, adjectivesu·per·ac·cu·rate·ly, adverbsu·per·ac·cu·rate·ness, nounun·ac·cu·rate, adjectiveun·ac·cu·rate·ly, adverbun·ac·cu·rate·ness, noun

Synonyms

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1. true, unerring.

Synonym study

1. See correct.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for unaccurate

accurate

adjective
  1. faithfully representing or describing the truth
  2. showing a negligible or permissible deviation from a standardan accurate ruler
  3. without error; precise; meticulous
  4. maths
    1. (to n significant digits) representing the first n digits of the given number starting with the first nonzero digit, but approximating to the nearest digit in the final positionsince π = 3.14159…, the approximation 3.1416 is accurate to 5 significant digits.
    2. (to n decimal places) giving the first n digits after the decimal point without further approximationπ = 3.1415 is in this sense accurate to 4 decimal places
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Derived Formsaccurately, adverbaccurateness, noun

Word Origin

C16: from Latin accūrātus, past participle of accūrāre to perform with care, from cūra care
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unaccurate

accurate

adj.

1610s, "done with care," from Latin accuratus "prepared with care, exact, elaborate," past participle of accurare "take care of," from ad- "to" (see ad-) + curare "take care of" (see cure). The notion of doing something carefully led to that of being exact (1650s). Related: Accurately; accurateness.

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Online Etymology Dictionary, © 2010 Douglas Harper