# thoughtless

/ˈθɔtɫəs/ (US) · /θˈɔːtləs/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/thoughtless
Updated: 2026-05-19

## Definition

not thinking about how your actions might hurt or bother other people. You use this to describe someone who acts without care or consideration.

For teachers: lacking consideration for the feelings, needs, or safety of others. Often used to describe actions or people that are careless or inconsiderate.

## Examples

- His thoughtless comment made everyone in the room uncomfortable.
- Leaving the front door unlocked was a thoughtless act that put the whole family at risk.
- The architect's thoughtless design ignored the local community's concerns about noise and traffic, leading to a significant protest from the residents.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.