/ Dictionary / Index S sounding machine: Meaning and Definition of Find definitions for: sound'ing machine" Pronunciation: [key] — Navig. Navig. any of various machines for taking and recording soundings. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sounding line sounding rocket Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language