Simple Definition of muster

from our Learner's Dictionary

muster

1 of 2

verb

musters; mustered; mustering
1
: to work hard to find or get (courage, support, etc.)
They pushed the car with all the strength they could muster.
He finally mustered (up) the courage to ask her on a date.
The country's leaders have been trying to muster (up) support for the war.
They mustered (up) the 20 votes needed to pass the law.
2
: to gather together (a group of people, soldiers, etc.) especially for battle or war
muster an army
The soldiers mustered [=gathered] in the center of town.

muster

2 of 2

noun

plural musters
: a formal military gathering to examine or test soldiers
a muster of soldiers

Cite this Entry

“Muster.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/muster. Accessed 21 Jun. 2026.

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