adj. 1.  Of or relating to a monarch. 2.  Of the rank of a monarch. 3.  Of, relating to, or in the service of a kingdom. 4.  Issued or performed by a monarch: a royal warrant; a royal visit. 5.  Founded, chartered, or authorized by a monarch: a royal society of musicians. 6.  Befitting royalty; stately: royal treatment. 7.  a.  Superior, as in size or quality. b.  Used as an intensive: "It would be a first-class royal mess" (Sam Nunn). n. Idiom: 1.  Informal   A member of a monarch's family: "Among the resort's distinguished visitors are Swedish and Spanish royals" (Alistair Scott). 2.  Nautical   A sail set on the royalmast. 3.  A paper size, 20 by 25 inches for printing, 19 by 24 inches for writing.  the royal road  A way or method that presents no difficulties: the royal road to success. [Middle English, from Old French, from Latin rēgālis, from rēx, rēg-, king; see  reg- in the Appendix of Indo-European roots.] royal·ly adv.  | 
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