/ Dictionary / Index L lengthy: Meaning and Definition of Find definitions for: length•y Pronunciation: (lengk'thē, leng'-, len'-), [key] — length•i•er, length•i•est. having or being of great length; very long: a lengthy journey. tediously verbose; very long; too long: a lengthy speech. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lengthy (Thesaurus) lengthwise Lengua Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language