solid as a rock

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English[edit]

Adjective[edit]

as solid as a rock (not comparable)

  1. (simile) Extremely thick and heavy, so as to make it impossible to move.
    We're not going to be able to break down this door, it's solid as a rock.
  2. (simile, of a person) Very reliable and dependable
    Stewart has been solid as a rock ever since becoming the new vice-chairman.

Synonyms[edit]