or sea floor

[ see-flawr ]

  1. the solid surface underlying a sea or an ocean.

Origin of seafloor

First recorded in 1850–55; sea + floor Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use seafloor in a sentence

  • Considerably more than half of the sea floor lies at a depth exceeding two thousand fathoms, or more than two geographical miles.

  • Far off, mournfully the bell-buoy sent in its blur of musical tolling across the moving sea-floor.

    Cursed | George Allan England