careless

adjective

care·​less ˈker-ləs 

1

a

: free from care : untroubled

careless days

b

: indifferent, unconcerned

careless of the consequences

2

: not taking care

My brother was too careless of his charge.

—Shakespeare

3

: not showing or receiving care:

a

: negligent, slovenly

careless writing

b

: unstudied, spontaneous

a careless grace

a careless glance

c

obsolete : unvalued, disregarded

carelessly adverb

carelessness noun

Synonyms

• unsafe
• reckless
• regardless

Examples of careless in a Sentence

He is a careless worker.

She was careless with my things.

It was a careless mistake.

a newspaper known for careless reporting

Recent Examples on the Web

The problem isn’t that general providers are careless, but that their systems and staff simply aren’t built for these edge cases. —Ari Raptis, Forbes.com, 25 June 2025

When businesses are careless and people get hurt, those businesses should be held accountable. —Chicago Tribune, 3 June 2025

The driver was cited for careless driving causing bodily injury, which is a misdemeanor traffic offense, according to state law. —Jessica Alvarado Gamez, Denver Post, 4 June 2025

Carlos Guillermo Alonso, 79, the alleged operator of the boat that struck the teen, has been charged with two misdemeanors for careless operation of a vessel, according to the FWC. —Meredith Deliso, ABC News, 3 June 2025

Word History

Etymology

see care entry 1

First Known Use

before the 12th century, in the meaning defined at sense 1a

Rhymes for careless

• airless
• hairless

Kids Definition

careless

adjective

care·​less ˈke(ə)r-ləs 

ˈka(ə)r-

1

: free from care : not troubled

2

: not taking proper care

a careless worker

3

: done, made, or said without proper care

a careless mistake

carelessly adverb

carelessness noun

Legal Definition

careless

adjective

care·​less

: not showing due care : negligent

careless driving

compare reckless