Pronunciation: (sän bläs'), [key]
1. Gulf of, a gulf of the Caribbean on the N coast of Panama.
2. Isthmus of, the narrowest part of the Isthmus of Panama. 31 mi. (50 km) wide.
3. the Cuna Indian people who inhabit the islands in the Gulf of San Blas.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.