1. Moving with quick light steps
   "she walked lightsomely down the long staircase"
   - trippingly 
2. In a light-hearted manner
   - light-heartedly

See also: lightsome

• reaction formation
• reaction propulsion
• reaction time
• reaction turbine
• reaction-propulsion engine
• reactionary
• reactionism
• reactionist
• reactivate
• reactive
• reactive depression
• reactive schizophrenia
• reactivity
• reactor
• read
• read between the lines
• Read method
• Read method of childbirth
• read-only file
• read-only memory
• read-only memory chip
• read-only storage
• read/write head
• read/write memory
• readability