to assemble (troops, a ship's crew, etc.), as for battle, display, inspection, orders, or discharge.

to gather, summon, rouse (often fol. by up )

He mustered all his courage.

to assemble for inspection, service, etc., as troops or forces.

to come together; collect; assemble; gather.

an assembling of troops or persons for formal inspection or other purposes.

an assemblage or collection.

the act of mustering.

Also called muster roll. (formerly) a list of the persons enrolled in a military or naval unit. ?

muster in, to enlist into service in the armed forces.

muster out, to discharge from service in the armed forces

He will be mustered out of the army in only two more months.

pass muster

to pass a cursory inspection.

to measure up to a certain standard; be adequate

Your grades don't pass muster.

verb

muster