1. Without formality
   "he visited us informally" 
2. With the use of colloquial expressions
   - colloquially, conversationally

See also: informal

Antonym: formally

• caffein
• caffein addict
• caffein addiction
• caffeine
• caffeine addict
• caffeine intoxication
• caffeinic
• caffeinism
• caffer
• caffer cat
• caffre
• caffè latte
• caftan
• café au lait
• café noir
• café royale
• cage
• cage in
• cager
• cagey
• cageyness
• cagily
• caginess
• Cagliostro
• Cagney