Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “careless”


adjective (NO ATTENTION)    /ˈkeə.ləs/ US  /ˈker-/
B1 not taking or showing enough care and attention: My son's teacher says that his work is often rather careless. He made a careless remark (= one made without thinking) about her appearance that really upset her.Not paying attentionTreating as unimportantNeglecting and ignoring carelessly     /-li/ adverb B2 He told me off for driving carelessly.Not paying attentionTreating as unimportantNeglecting and ignoringCalm and relaxed carelessness     /-nəs/ noun [U] Not paying attentionTreating as unimportantNeglecting and ignoringPleasure and happiness
(Definition of careless adjective (NO ATTENTION) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of careless

Browse related topics

You are looking at an entry to do with Not paying attention, but you might be interested in these topics from the Attention and care topic area:

More definitions for “careless”

Definitions of “careless” in other dictionaries

Word of the Day


showing a wish to help or bring advantages to others, even if it results in disadvantage for yourself

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More