# reachable

/ˈɹitʃəbəɫ/ (US) · /ɹˈiːtʃəbəl/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/reachable
Updated: 2026-05-30

## Definition

able to be touched, reached, or contacted. In math, it describes a point or number that can be found by following a specific path or rule.

For teachers: capable of being contacted, touched, or accessed. In a mathematical context, it refers to a point or set that can be connected to another through a defined sequence or function.

## Examples

- The top shelf is not reachable for most people.
- The emergency exit is designed to be reachable from every corner of the building.
- In graph theory, a node is considered reachable if there exists a path of connected edges leading from the starting point to that specific vertex.

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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.