1 call or come together, assemble, convoke, convene, collect, mobilize, rally, round up, gather, marshal, summon (up):
Within a month he had mustered a force of thousands to fight the invaders. I mustered up enough courage to ask Joan out to dinner.
2 rally, assembly, assemblage, convocation, meet, meeting, convention, congress, round-up, turnout, gathering, congregation, aggregation, aggregate:
We attended the annual muster of bagpipe marching bands.
3 pass muster. come up to scratch, make the grade, measure up, be acceptable, Colloq come or be up to snuff:
Are you sure that your new design will pass muster with the art director?