/ Dictionary / Index P Ptolemy: Meaning and Definition of Find definitions for: Ptol•e•my Pronunciation: (tol'u-mē), [key] — pl. -mies (Claudius Ptolemaeus) fl.a.d. 127–151, Hellenistic mathematician, astronomer, and geographer in Alexandria. any of the kings of the Macedonian dynasty that ruled Egypt 323–30b.c. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ptolemy (Thesaurus) Ptolemaist Ptolemy I Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language