1. In an outstanding manner or to an outstanding degree
   "she was outstandingly successful in her profession" 
2. To a remarkable degree or extent
   - unusually, remarkably, unco [UK, dialect], uncommon [archaic]

See also: outstanding

• ontology
• onus
• onward
• onward motion
• onwards
• onya
• onycha
• Onychium
• Onychogalea
• onycholysis
• Onychomys
• Onychophora
• onychophoran
• onychosis
• onymous
• onyx
• onyx marble
• onyxis
• oocyte
• oodles
• oogenesis
• ooh
• oolite
• oology
• oolong