WordWeb Online

1. In secrecy; not openly
   "met secretly to discuss the invasion plans"; "the children secretly went to the movies when they were supposed to be at the library"
   - in secret, on the Q.T., on the QT
    
2. Not openly; inwardly
   "they were secretly delighted at his embarrassment"; "hoped secretly she would change her mind"

See also: secret

Encyclopedia: Secretly