WordWeb Online

1. Smoothly and without difficulty; precisely and deftly
   "she played the piano accompaniment cleanly"; "he bounced it cleanly off the wall";
   - flawlessly
    
2. In a manner that minimizes dirt and pollution
   "the motor burns cleanly"

1. Habitually clean
   "cleanly in their persons and habitations"

Derived forms: cleanlier, cleanliest

See also: clean