# solid as a rock

> English word · Adjective

## Definitions
1. Extremely thick and heavy, so as to make it impossible to move.
2. Very reliable and dependable

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/solid-as-a-rock