/san' wahn", hwahn"/ ; Sp. /sahn hwahn"/
1. a seaport in and the capital of Puerto Rico, in the N part. 424,600.
2. a city in W Argentina. 290,479.
3. 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.