# boundless

/ˈbaʊndɫəs/ (US) · /bˈaʊndləs/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/boundless
Updated: 2026-05-09

## Definition

having no limits or end. You use this to describe things like energy, space, or imagination that seem to go on forever.

For teachers: having no boundaries or limits; infinite in scope or extent. Often used figuratively to describe abstract qualities like enthusiasm or potential.

## Examples

- She has boundless energy and never seems to get tired.
- The internet offers boundless opportunities for learning new skills from the comfort of your home.
- The poet was inspired by the boundless horizon of the ocean, which served as a metaphor for the human spirit's capacity for hope.

## Usage notes

- Typically used as an attributive adjective before a noun; frequently collocates with 'energy', 'enthusiasm', or 'possibilities'.

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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.