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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

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."

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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.

Only the truly inattentive will be shocked that complications ensue.

From The Wall Street Journal • Jun. 12, 2026

In Europe, for example, where Musk has said he hopes to win approval for FSD as soon as February, carmakers are mandated to have effective strategies to warn inattentive drivers.

From BBC • Dec. 26, 2025

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

From Salon • Apr. 5, 2025

Beyond airing allegations that Gutierrez was inattentive, “sloppy” and lacked respect among crew members and producers, prosecutors produced fresh details about Baldwin’s behind-the-scenes actions.

From Los Angeles Times • Mar. 6, 2024

Then, inattentive as ever, she asked him if he knew how to wiggle his ears.

From "The House of the Spirits: A Novel" by Isabel Allende

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