English Reference

Word

marines

US/mɝˈinz/

UK/məɹˈiːnz/

Definitions

01military branch

B2

n. a military group trained to fight on land and at sea.

n. A military force trained for amphibious warfare, typically serving as a specialised branch of a nation's navy.

“After finishing high school, he decided to join the marines to see the world.”

“The marines were deployed to the coastal region to secure the harbour before the main army units arrived.”

Usage

Often capitalised when referring to a specific national branch, such as the Royal Marines.

Teaching tip

In the US, 'the Marines' refers specifically to the US Marine Corps, which is a distinct branch from the Army or Navy.

Synonyms

marine corpsamphibious forces

02individual soldiers

B2

n. the individual soldiers who belong to a marine corps.

n. The plural form of marine, referring to individual members of an amphibious military unit.

“Several marines stood guard at the entrance to the embassy.”

“A small group of marines remained behind to coordinate the evacuation of the remaining civilians from the shoreline.”

Usage

Used as a countable plural noun.

Synonyms

Real-World Examples

“The resort city of Pattaya, a rest-and-recreation destination for US troops since the Vietnam war, has stepped up security as it prepares to welcome the sailors and Marines.”
The Guardian · 2 Sept 2026
“More than 5,000 sailors and Marines are housed on board.”
Al Jazeera · 14 Aug 2026

Idioms

tell it to the marines — I do not believe what you said.

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

Scan code

English Reference