1. Without force or sincere effort
   "smiled thinly" 
2. Without viscosity
   - thin 
3. In a small quantity or extent
   "spread the margarine thinly over the meat"
   - lightly 
4. In a widely distributed manner
   "thinly overgrown mountainside"

See also: thin

Antonym: thickly

• radical sign
• radicalise
• radicalism
• radicalize
• radically
• radicchio
• radicle
• radicular
• radiculitis
• Radiigera
• Radiigera fuscogleba
• radio
• radio aerial
• radio announcer
• radio antenna
• radio astronomy
• radio beacon
• radio beam
• radio brightness
• radio broadcast
• radio button
• radio chassis
• radio compass
• radio detection and ranging
• radio emission