/ Dictionary / Index P Pollux: Meaning and Definition of Find definitions for: Pol•lux Pronunciation: (pol'uks), [key] — n. Greek,the brother of Castor. Cf. a first-magnitude star in the constellation Gemini. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pollux (Thesaurus) pollution poll watcher Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language