1. Having some official authority or sanction

See also: official

• arch over
• arch support
• archaean
• archaebacteria
• archaebacterium
• archaeo-
• archaeobacteria
• archaeologic
• archaeological
• archaeologically
• archaeologist
• archaeology
• archaeopteryx
• Archaeopteryx lithographica
• archaeornis
• Archaeornithes
• archaeozoic
• Archaeozoic aeon
• archaic
• archaically
• archaicism
• archaise
• archaism
• archaist
• archaistic