/ Dictionary / Index P Plotinus: Meaning and Definition of Find definitions for: Plo•ti•nus Pronunciation: (plō-tī'nus), [key] — n. a.d.205?–270?, Roman philosopher, born in Egypt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plotinus (Thesaurus) Plotinism plot line Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language