1. able to live both on land and in water
Usage: biology
2. involving both land and sea forces in military operations
Usage: military
3. designed to operate on both land and water

Examples

• Frogs are amphibious animals that can breathe through their skin.
• The salamander is an amphibious creature found near ponds.
• The military planned an amphibious assault on the enemy coastline.
• Amphibious landing craft carried troops from ship to shore.
• The amphibious vehicle could drive on roads and float across rivers.
• Duck boats are amphibious tours that go on both land and water.
• Marines specialize in amphibious warfare operations.