Dictionary.com
definitions

careful

[kair-fuhl]
||
SEE MORE SYNONYMS FOR careful ON THESAURUS.COM

adjective

cautious in one's actions: Be careful when you cross the street.
taking pains in one's work; exact; thorough: a careful typist.
(of things) done or performed with accuracy or caution: careful research.
solicitously mindful (usually followed by of, about, or in): careful of the rights of others; careful about one's behavior; careful in speech.
Archaic.
  1. full of anxiety or care; troubled.
  2. causing or attended with anxiety: a careful day.

Origin of careful

before 1000; Middle English; Old English carful, cearful. See care, -ful
Related formscare·ful·ly, adverbcare·ful·ness, nounqua·si-care·ful, adjectivequa·si-care·ful·ly, adverbul·tra·care·ful, adjectiveul·tra·care·ful·ly, adverb

Synonyms for careful

SEE MORE SYNONYMS FOR careful ON THESAURUS.COM
1. watchful, guarded, chary, circumspect. 2. meticulous, discerning. 3. conscientious. 4. thoughtful, concerned, solicitous, attentive, heedful, regardful.

Synonym study

1. Careful, cautious, discreet, wary imply a watchful guarding against something. Careful implies guarding against mistakes, by paying strict and close attention to details, and, often, trying to use good judgment: He was careful to distinguish between them. Cautious implies a fear of some unfavorable situation and investigation before coming to conclusions: cautious about investments. Discreet implies being prudent in speech and action and being trustworthy as a confidant: discreet in manner, in keeping secrets. Wary implies a vigilant lookout for a danger suspected or feared: wary of polite strangers. 2, 3. See painstaking.

Antonyms for careful

1–4. careless.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for careful

precise, accurate, attentive, choosy, mindful, wary, scrupulous, meticulous, deliberate, thorough, judicious, thoughtful, discreet, circumspect, conscientious, vigilant, rigorous, prudent, leery, concerned

Examples from the Web for careful

Contemporary Examples of careful

Historical Examples of careful

  • This is a record and result that no careful student of our history will, I take it, deny.

    'Tis Sixty Years Since

    Charles Francis Adams

  • Andy chose the careful insult which he would throw in Buck's face.

  • I think we should be careful of our judgment as to when that state has been reached.

    Weighed and Wanting

    George MacDonald

  • But he saw Hester look anxious; and that was enough to put him on his careful honour.

    Weighed and Wanting

    George MacDonald

  • Then I hope you will be careful what houses you go into, for I hear the small-pox is in the neighborhood.

    Weighed and Wanting

    George MacDonald

British Dictionary definitions for careful

careful

adjective

cautious in attitude or action; prudent
painstaking in one's work; thoroughhe wrote very careful script
(usually postpositive; foll by of, in, or about) solicitous; protectivecareful of one's reputation
archaic full of care; anxious
British mean or miserly
Derived Formscarefully, adverbcarefulness, noun
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 careful
adj.

Old English cearful "mournful, sad," also "full of care or woe; anxious; full of concern" (for someone or something), thus "applying attention, painstaking, circumspect;" from care (n.) + -ful.

Online Etymology Dictionary, © 2010 Douglas Harper