isthmus - a relatively narrow strip of land (with water on both sides) connecting two larger land areasCentral America - the isthmus joining North America and South America; extends from the southern border of Mexico to the northern border of Colombia Isthmus of Corinth - a narrow isthmus between the Gulf of Corinth and the Saronic Gulf; a canal crosses the isthmus so that navigation is possible between the gulfs Isthmus of Kra - a narrow isthmus linking the Malay Peninsula to the Asian mainland Isthmus of Suez - the isthmus in northeastern Egypt that connects Africa and Asia Isthmus of Tehuantepec - the narrowest part of southern Mexico is an isthmus between the Bay of Campeche on the north coast and the Gulf of Tehuantepec on the south coast Karelian Isthmus - the isthmus between the Gulf of Finland and Lake Ladoga that connects Finland and Russia dry land, ground, solid ground, terra firma, land, earth - the solid part of the earth's surface; "the plane turned away from the sea and moved back over land"; "the earth shook for several minutes"; "he dropped the logs on the ground" |