# outermost

/ˈaʊtɝˌmoʊst/ (US) · /ˈaʊtəmˌəʊst/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/outermost
Updated: 2026-05-31

## Definition

the furthest away from the center or the middle of something. It describes the part that is on the very edge.

For teachers: situated at the greatest distance from the center or the interior of an object. Often used to describe the outermost layer or boundary of a physical structure.

## Examples

- The outermost layer of the skin is called the epidermis.
- The planet Neptune is the outermost planet in our solar system, located farthest from the sun.
- The architect designed the outermost walls with thick insulation to protect the interior from the extreme temperature fluctuations of the desert climate.

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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.