/ Dictionary / Index H Hyannis Port: Meaning and Definition of Find definitions for: Hy•an'nis Port" Pronunciation: (hī-an'is), [key] a town in SE Massachusetts, on Nantucket Sound: summer resort. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hyaluronidase HY antigen Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language