Definition of: amphibious

(am·fib′ē·əs) adjective
1. Living or adapted to life on land or in water.
2. Capable of operating on land or water: an amphibious tank.
3. Capable of operating on water and in the air: an amphibious airplane.
4. Of a mixed nature; connected with two ranks, classes, etc. [<Gk. amphibios having a double life <amphi- of two kinds + bios life]
—am·phib′i·ous·ly adverb
—am·phib′i·ous·ness noun