WordWeb Online

1. In a nasty ill-tempered manner
   "'Don't expect me to help you,' he added meanly"
   - nastily
    
2. In a despicable, ignoble manner
   "this new leader meanly threatens the deepest values of our society"
   - scurvily, basely
    
3. Poorly or in an inferior manner
   "troops meanly equipped"
    
4. In a miserly manner
   "they lived meanly and without ostentation"
   - humbly

See also: mean