a permanent organization of the military land forces of a nation or state
"The new budget proposal aims to modernize our army by upgrading its tanks and communication systems."
a large number of people united for some specific purpose
"The volunteers formed an army to clean up the entire coastline after the storm."
the army of the United States of America; the agency that organizes and trains soldiers for land warfare
"After graduating from basic training, she received her orders to deploy overseas with the Army."
A large, highly organized military force, concerned mainly with ground (rather than air or naval) operations.
"When the new music video dropped, the entire army spent all night streaming it to break records on YouTube."
Used absolutely for that entire branch of the armed forces.
The fandom of the K-pop boy band BTS.
In plain English: An army is a very large group of soldiers who fight together for a country.
"The army marched through the streets to celebrate the victory."
Usage: When referring to the massive global fanbase of the K-pop group BTS, use "army" specifically as a proper noun and capitalize it (e.g., "BTS army"). Do not confuse this specific fandom usage with the standard definition of a large military force or a vast number of people.
A sports team representing the US Military Academy at West Point.
"The Army won the championship last year, and their cadets wore their dress blues during the victory parade."
The word army entered English in 1386 from the Old French armee, which originally meant an armed force. It derives from the Latin verb to arm, reflecting its core meaning of soldiers equipped with weapons.