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

See also: illicit

Antonym: licitly

• Mansart
• manse
• manservant
• Mansfield
• Mansi
• mansion
• mansion house
• manslaughter
• manslayer
• Manson
• mansuetude
• manta
• Manta birostris
• manta ray
• manteau
• Mantegna
• Manteidae
• mantel
• mantelet
• Mantell
• mantelpiece
• mantelshelf
• Manteodea
• mantic
• mantichora