From Longman Dictionary of Contemporary Englishmustermus‧ter1 /ˈmʌstə $ -ər/ ●○○ verb 🔊 🔊 1TRY TO DO OR GET something[transitive] (also muster up something) to get enough courage, confidence, support etc to do something, especially with difficulty syn summon (up)muster (up) the courage/confidence/energy etc to do something 🔊 Finally I mustered up the courage to ask her out. 🔊 Senator Newbolt has been trying to muster support for his proposals. 🔊 ‘It’s going to be fine, ’ replied David, with as much confidence as he could muster.2CROWD[intransitive, transitive] if soldiersmuster, or if someone musters them, they come together in a group syn gather 🔊 In April 1185, he began to muster an army.→ See Verb table
Examples from the Corpus
muster• In their second innings Sri Lanka could only muster 256.• But it would have taken more courage than I could muster.• Opera debut as Susanna, mustered a big, bright sound from her very small stature.• And on the next day the Zuwaya did indeed muster a majority of 117 votes in the first count.• There were two knocks on the door before Graham could muster a reply.• Though Saskia musters all her forces to stave off adolescence, hormones are against her.• With more bravery than she had ever mustered before, Louisa retraced her steps.• Mandela musteredencouragement for the refugees, who are mostly Hutu.• Passengers were mustered to the lifeboats.muster (up) the courage/confidence/energy etc to do something• That you mustered the courage to come here in the first place-we know how disconcerting this sort of thing is for you.• It had taken the last half-hour to muster the courage tomention the subject yet again.• He was mustering up the courage toquit when Spider touched him on the shoulder.