Hardground

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A lithified seafloor.

    "Ancient hardgrounds are found in limestone sequences and distinguished from later-lithified sediments by evidence of exposure to normal marine waters."

  2. 2
    A hard stratum of rock other than coal.

Example

More examples

"Ancient hardgrounds are found in limestone sequences and distinguished from later-lithified sediments by evidence of exposure to normal marine waters."

Etymology

From hard + ground.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.