• synonyms


[see-flawr, -flohr]
  1. the solid surface underlying a sea or an ocean.
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Origin of seafloor

First recorded in 1850–55; sea + floor
Also called seabed.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for sea-floor

Historical Examples

  • They had ropes, and in seconds they'd lashed us down to the sea-floor.

    Under Arctic Ice

    H.G. Winter

  • The darkness on the sea-floor was too thick, the wavering shadows too deceptive.

  • The sea-floor is transformed when it enters into the new element.

  • Annelids left their traces in burrows and casts on the sea-floor (Arenicolites, Cruziana, Scolithus, &c.).

  • But it is difficult to believe that the sea-floor could have subsided to such an extent in recent times.

Word Origin and History for sea-floor


1832, from sea + floor (n.).

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Online Etymology Dictionary, © 2010 Douglas Harper