Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adverb: illegitimately  ,i-li'ji-tu-mut-lee
  1. In a manner disapproved or not allowed by custom
    "He acted illegitimately when he increased the rent fourfold";
    - illicitly
  2. Of biological parents not married to each other
    "this child was born illegitimately";
    - out of wedlock

Antonym: legitimately