an army unit usually consisting of two or more divisions and their support
"The general ordered the entire corps to advance across the river under cover of night."
A battlefield formation composed of two or more divisions.
"The new recruits from the business school are now part of the summer intern corps at our company."
plural of corp
In plain English: A corps is an organized group of people working together for a specific purpose, like a military unit or a volunteer team.
"The military corps was deployed to support the troops in the front lines."
Usage: Do not confuse the noun corps, which refers to a group of people with a common function like a military unit or police force, with its plural form corpse. The word corps always takes a plural verb and remains unchanged in the singular.
The word comes from the French phrase corps d'armée, which literally means "army body." It entered English to refer specifically to a military unit, while its relatives include the words corpse and corpus.