adj.
   - relating to or having the status of a king or queen or a member of their family.
 - of a quality or size suitable for a king or queen; splendid.
 - Brit. informal real; utter (used for emphasis):
 she's a right royal pain in the behind.
 
n.
   - informal a member of the royal family.
 - 
(in full metric royal)
 a paper size, 636 × 480 mm. 
▸
(in full royal octavo)
 a book size, 234 × 156 mm.
 ▸
(in full royal quarto)
 a book size, 312 × 237 mm.
 - Bell-ringing  a system of change-ringing using ten bells.
 
 
  Phrase
  
    
      - the royal we
 the use of ‘we’ instead of ‘I’ by a single person, as traditionally used by a sovereign. 
    
   
  Derivative
  
  Etymology
  ME: from OFr. roial, from L. regalis ‘regal’.