English Reference
Adjective

reachable

adj.
B2 Upper Intermediate US /ˈɹitʃəbəɫ/ UK /ɹˈiːtʃəbəl/ reach·able Mathematics

adj.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.

adj.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.


SIMPLE

The top shelf is not reachable for most people.

CONTEXTUAL

The emergency exit is designed to be reachable from every corner of the building.

COMPLEX

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.

He said he had given his phone to his sister so she could keep in touch, but the mobile was no longer reachable.

BBC News· 28 Aug 2026
This entry
Level B2 · Upper Intermediate
Frequency Occasional
Updated