v. mus·tered, mus·ter·ing, mus·ters
1. To call (troops) together, as for inspection.
2. To cause to come together; gather: Bring all the volunteers you can muster.
3. To bring into existence or readiness; summon up: mustering up her strength for the ordeal. See Synonyms at call.
To assemble or gather: mustering for inspection.
a. A gathering, especially of troops, for service, inspection, review, or roll call.
b. The persons assembled for such a gathering.
2. A muster roll.
3. A gathering or collection: a muster of business leaders at a luncheon.
4. A flock of peacocks.
To enlist or be enlisted in military service: She mustered in at the age of 18.
To discharge or be discharged from military service: He was mustered out when the war ended.
To be judged as acceptable.
[Middle English mustren, from Old French moustrer, from Latin mōnstrāre, to show, from mōnstrum, sign, portent, from monēre, to warn; see men-1 in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.