solid as a rock

English

Adjective

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
  • (thick and heavy): rock-solid
  • (reliable and dependable): rock-solid
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