illegitimately

Adverbial illegitimately has 2 senses

• illegitimately(r = adv.all) illicitly - in a manner disapproved or not allowed by custom; "He acted illegitimately when he increased the rent fourfold"
Antonym: legitimately

• illegitimately(r = adv.all) out of wedlock - of biological parents not married to each other; "this child was born illegitimately"
Antonym: legitimately