/ Dictionary / Index C Caernarvon: Meaning and Definition of Find definitions for: Caer•nar•von Pronunciation: (kär-när'vun), [key] — n. a seaport in W Gwynedd, in NW Wales, on Menai Strait: 13th-century castle of Edward II. 9253. Caernarvonshire. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Caerleon Caernarvonshire Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language