/ Dictionary / Index G ground log: Meaning and Definition of Find definitions for: ground' log" Pronunciation: [key] — Naut. Naut. a lead weight attached to a line, cast overboard in shoal water and allowed to pay out freely to show the speed of a ship and the force of the current. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. groundling ground loop Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language