a warrant rank in the Royal Air Force, equal to but before a warrant officer
noun, Metallurgy. 1. an alloy rich in certain elements, used in small quantities as an additive to melts of alloyed metal.
[mas-ter-uh t-ahrmz, mah-ster-] /ˈmæs tər ətˈɑrmz, ˈmɑ stər-/ noun, plural masters-at-arms. 1. an officer of a fraternal organization, veterans’ society, or the like, empowered to maintain order, exclude unauthorized persons, etc. 2. Navy. a petty officer who has various duties, such as keeping order on the ship, taking charge of prisoners, etc. noun (pl) masters-at-arms […]
noun 1. a private bathroom adjoining a master bedroom.
noun 1. a principal bedroom in a house or apartment, usually the largest, typically occupied by the person or persons who head the household.