1. With little weight or force
   "she kissed him lightly on the forehead";
   - softly, gently
    
2. To a slight degree
   "her speech is only lightly accented"
    
3. In a small quantity or extent
   "apply paint lightly";
   - thinly
    
4. With few burdens
   "experienced travellers travel lightly";
   - light
    
5. Indulging with temperance
   "we eat lightly in the morning"
    
6. Without good reason
   "one cannot say such things lightly"
    
7. With indifference or without dejection
   "he took it lightly"

Antonym: intemperately, thickly