/ Dictionary / Index W water tiger: Meaning and Definition of Find definitions for: wa'ter ti"ger Pronunciation: [key] the larva of a predaceous diving beetle, of the genus Dytiscus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. water thrush watertight Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language