/ Dictionary / Index R roller gate: Meaning and Definition of Find definitions for: roll'er gate" Pronunciation: [key] (on certain dams) a cylindrical gate that rises and falls by rotating against inclined racks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Roller Derby roller hockey Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language