/ Dictionary / Index U usucapion: Meaning and Definition of Find definitions for: u•su•ca•pi•on Pronunciation: (y"zu-kā'pē-on", -su-), [key] — n. Roman Law. the acquisition of property through long, undisturbed possession. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. usual usufruct Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language