Question 1

What does "muster out" mean?

Accepted Answer

To formally discharge or release someone from military service.

Question 2

How do you use "muster out" in a sentence?

Accepted Answer

After four years of service, he was mustered out with an honourable discharge.

Question 3

Is "muster out" formal or informal?

Accepted Answer

"muster out" is formal — used mainly in written or official contexts. Primarily American English, used in historical contexts (especially the Civil War and WWII). Largely replaced in modern usage by 'discharge.' May appear in historical fiction, military memoirs, or journalism. The opposite is 'muster in.'

muster out

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