1. In a manner disapproved or not allowed by custom
   - illegitimately 
2. In an illegal manner
   - illegally, lawlessly

See also: illicit

Antonym: licitly

• supermolecule
• supermom
• supernal
• supernatant
• supernatural
• supernatural being
• supernatural virtue
• supernaturalism
• supernaturalist
• supernaturalistic
• supernaturally
• supernaturalness
• supernormal
• supernova
• supernumerary
• superorder
• superorder Acanthopterygii
• superorder Labyrinthodonta
• superorder Labyrinthodontia
• superorder Malacopterygii
• superorder Ratitae
• superordinate
• superordinate word
• superordination
• superoxide