Army

n. military force, military troops

[Image:Weltkarte der Armeeformen.png|thumb|300px|Map of the world of the army forms Colour key: Green: No armed forces Blue: Fully voluntary/professional army Orange: Conscription, but abolition of conscription decided upon (<to 3 years) Red: Conscription (in some cases limited) Grey: No information]] An army (from Latin armata "act of arming" via Old French armée), in the broadest sense, is the land-based armed forces of a nation. It may also include other branches of the military such as an air force. Within a national military force, the word Army may also mean a field army, which is an operational  formation, usually made up of one or more corps.
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Noun
1. a permanent organization of the military land forces of a nation or state
(synonym) regular army, ground forces
(hypernym) military service, armed service, service
(hyponym) host, legion
(member-meronym) army unit
(classification) military, armed forces, armed services, military machine, war machine
2. a large number of people united for some specific purpose
(hypernym) crowd

n. army, military force, military troops

(n.)
A great number; a vast multitude; a host.
  

(n.)
A collection or body of men armed for war, esp. one organized in companies, battalions, regiments, brigades, and divisions, under proper officers.
  

(n.)
A body of persons organized for the advancement of a cause; as, the Blue Ribbon Army.