Dictionary.com
Thesaurus.com
Synonyms

inattentive

American  
[in-uh-ten-tiv] / ˌɪn əˈtɛn tɪv /

adjective

  1. not attentive; negligent.

    Inattentive or careless driving is a serious issue, and cell phones clearly contribute to it.

    Synonyms:
    thoughtless, slipshod, slapdash, remiss, regardless, neglectful, irresponsible, careless
    Antonyms:
    mindful, thoughtful, careful
  2. characterized by or exhibiting a lack of focus or concentration.

    Most children are occasionally inattentive, distractible, impulsive, or highly active.

    Synonyms:
    oblivious, faraway, dreamy, distracted, abstracted, absent-minded, absent, ditzy, unmindful, heedless, distrait, preoccupied
    Antonyms:
    mindful, thoughtful, careful

inattentive British  
/ ˌɪnəˈtɛntɪv /

adjective

  1. not paying attention; heedless; negligent

"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

Other Word Forms

  • inattention noun
  • inattentively adverb
  • inattentiveness noun

Etymology

Origin of inattentive

First recorded in 1735–45; in- 3 + attentive

Explanation

Someone who's inattentive isn't paying enough attention. An inattentive lunch companion might spend the whole meal texting on his phone. Inattentive people are sometimes distracted, like an inattentive babysitter who loses track of the kids he's watching at the playground. You can also be inattentive simply through indifference or boredom — if you're inattentive at the opera, you're not paying attention to it because you're not interested in it. Inattentive tacks the "not" prefix in- onto attentive, from the Latin root attendere, "give heed to" or "stretch toward."

Keep Reading on Vocabulary.com

Vocabulary lists containing inattentive

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Humans are not just inattentive; they are irrational in a profoundly emotional sense.

From Salon • Apr. 5, 2025

A new study calculates that exposure to car exhaust from leaded gas during childhood altered the balance of mental health in the U.S. population, making generations of Americans more depressed, anxious and inattentive or hyperactive.

From Science Daily • Dec. 4, 2024

The filing also says the Dali was manned by "an incompetent crew that was inattentive to its duties" and "lacked proper training".

From BBC • Apr. 23, 2024

Toward the end of freshman year, we all started hanging out at the house of a friend who had a big basement and inattentive parents.

From Los Angeles Times • Jan. 4, 2024

His inattentive students, longing for the end of the day, took little notice, I suspect, of the historic moment.

From "Cosmos" by Carl Sagan