amphibious

adjective

am·​phib·​i·​ous am-ˈfi-bē-əs 

1

: combining two characteristics

2

a

: relating to or adapted for both land and water

amphibious vehicles

b

: executed by coordinated action of land, sea, and air forces organized for invasion

an amphibious landing

also : trained or organized for such action

amphibious forces

3

: able to live both on land and in water

amphibious plants

amphibiously adverb

amphibiousness noun

Examples of amphibious in a Sentence

Recent Examples on the Web

The initial phase of the deployment includes a Marine air-ground task force aboard the amphibious assault ship USS Iwo Jima and two San Antonio-class transport ships, with more than 2,000 Marines prepared for rapid-response missions. —Antonio María Delgado, Miami Herald, 3 Oct. 2025

Visible operations—from stealth fighters and amphibious assault ships to transport aircraft—serve both as a deterrent and preparation for potential intervention, thereby heightening regional stakes. —John Feng, MSNBC Newsweek, 3 Oct. 2025

Two White House officials previously told CNN that the US would send 10 of those planes to the island, where a unit of US Marines has been conducting training exercises for amphibious landings. —Michael Rios, CNN Money, 2 Oct. 2025

The swamp region was home to many Indigenous cultures, now referred to as amphibious due to their proximity to water. —Karla Gachet, NPR, 1 Oct. 2025

Word History

Etymology

Latin amphibius "living both on land and in water" (borrowed from Greek amphíbios "living a double life, living both on land and in the water," from amphi- amphi- + -bios "having such a mode of life," derivative of bíos "life") + -ous — more at quick entry 1

First Known Use

1608, in the meaning defined at sense 1

Kids Definition

amphibious

adjective

am·​phib·​i·​ous am-ˈfib-ē-əs 

1

: able to live both on land and in water

amphibious plants

2

a

: designed for use on both land and water

amphibious vehicles

b

: carried out by land, sea, and air forces acting together

an amphibious assault

amphibiously adverb

amphibiousness noun

Etymology

from Greek amphibios "living a double life," from amphi- "around, on both sides" and bios "mode of life"