1. With brightness
   "the stars shone brilliantly"
   - brightly, bright 
2. In an extremely intelligent way
   "he solved the problem brilliantly"

See also: brilliant

• retroaction
• retroactive
• retroactively
• retrobulbar neuritis
• retrocede
• retrocession
• retrochoir
• retrofit
• retroflection
• retroflex
• retroflexed
• retroflexion
• retrogradation
• retrograde
• retrograde amnesia
• retrogress
• retrogression
• retrogressive
• retromandibular vein
• retronym
• Retrophyllum
• retrorocket
• retrorse
• retrospect
• retrospection