/ Dictionary / Index S San Juan: Meaning and Definition of Find definitions for: San Juan Pronunciation: (san" wän', hwän' Sp. sän hwän'), [key] a seaport in and the capital of Puerto Rico, in the N part. 424,600. a city in W Argentina. 290,479. a river in S Nicaragua, flowing E from Lake Nicaragua along the Nicaragua-Costa Rica border to the Caribbean Sea. ab. 110 mi. (175 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. San Jose scale San Juan Capistrano Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language