negligent

adjective

neg·​li·​gent ˈne-gli-jənt 

1

a

: marked by or given to neglect especially habitually or culpably

… was a careless workman, negligent of details.

—Edith Hamilton

b

: failing to exercise the care expected of a reasonably prudent person in like circumstances

negligent about traffic regulations

The defendant in a negligence action may use contributory negligence as a defense. If the plaintiff is also negligent and that negligent action contributed to the loss, he or she may be denied recovery.

—Robert I. Mehr

2

: marked by a carelessly easy manner

negligently adverb

Did you know?

To be negligent is to be neglectful. Negligence is an important legal concept; it's usually defined as the failure to use the care that a normally careful person would in a given situation. Negligence is a common claim in lawsuits regarding medical malpractice, auto accidents, and workplace injuries. But you can also be negligent about answering your email, or negligent in the way you dress. (The original garment called a negligee was worn by women who had neglected to get fully dressed.) The legal meanings of negligent and negligence, however, tend to be the ones we most often encounter nowadays.

Synonyms of negligent

• neglectful
• careless
• neglecting
• lazy

Choose the Right Synonym for negligent

negligent, neglectful, lax, slack, remiss mean culpably careless or indicative of such carelessness.

negligent implies inattention to one's duty or business.

negligent about writing a note of thanks

neglectful adds a more disapproving implication of laziness or deliberate inattention.

a society callously neglectful of the poor

lax implies a blameworthy lack of strictness, severity, or precision.

a reporter lax about accurate quotation

slack implies want of due or necessary diligence or care.

slack workmanship

remiss implies blameworthy carelessness shown in slackness, forgetfulness, or neglect.

had been remiss in their familial duties

Examples of negligent in a Sentence

The fire was started by a negligent smoker.

He was negligent in not reporting the accident to the police.

Recent Examples on the Web

The woman who caused the car accident that killed Khyree Jackson, who was a rookie on the Minnesota Vikings last year at the time of his death, pleaded guilty to three counts of negligent homicide under the influence of alcohol on Friday. —Jackson Thompson, FOXNews.com, 8 Nov. 2025

Clingman was arrested and initially charged with 13 counts, including negligent manslaughter, homicide as a result of negligent driving and drunken driving in January. —Kimberlee Speakman, PEOPLE, 8 Nov. 2025

Shockley and Maycock accused the company of negligent failure to warn them, negligent failure to maintain the vessel and general negligence. —Nathan Diller, USA Today, 7 Nov. 2025

Some of these problem renters brought into the HOA by negligent landlords linger around for years before they are evicted. —Kelly G. Richardson, Oc Register, 7 Nov. 2025

Word History

Etymology

Middle English necligent, negligent, borrowed from Anglo-French & Latin; Anglo-French, borrowed from Latin neglegent-, neglegens (also neclegens, negligens), present participle of neglegere, neclegere "to disregard, do nothing about, fail to care for" — more at neglect entry 1

First Known Use

14th century, in the meaning defined at sense 1a

Kids Definition

negligent

adjective

neg·​li·​gent ˈneg-li-jənt 

1

: marked by or likely to show neglect

2

: failing to take proper or normal care

negligently adverb

Legal Definition

negligent

adjective

neg·​li·​gent ˈne-gli-jənt 

: marked by, given to, or produced by negligence

a negligent act

the defendant was negligent

negligently adverb