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

But the deployment of—among others—three destroyers, at least one submarine and an amphibious ready group (ARG) filled with Marines is a further deterioration in the poor relationship between Washington and Caracas that appears to have spooked Maduro. —Ellie Cook john Feng, MSNBC Newsweek, 3 Sep. 2025

Their ability to operate autonomously in hazardous conditions could reduce human casualties in urban or amphibious battles. —Kapil Kajal, Interesting Engineering, 3 Sep. 2025

Cape Fahn Hotel sits on its own private island off Choeng Mon Beach, accessible only by boat or, during low tide, an amphibious truck that transforms into a vessel as the tide rises. —Jenn Rice, Forbes.com, 1 Sep. 2025

By adding amphibious vessels, the task force gains expanded land capabilities, particularly the ability to quickly deploy Marines into coastal zones. —Jay Weaver, Miami Herald, 23 Aug. 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"