Not conforming to known principles, or established or accepted rules or standards.
[…] it may be impossible to convince them that the illegitimate power which they obtain, by degrading themselves, is a curse […]
Not sanctioned by marriage.
If we credit the scandal of the former [i.e. his enemies], Artaxerxes sprang from the illegitimate commerce of a tanner’s wife with a common soldier.
A person born to unmarried parents.
Her father and mine was a shameless man and of all his illegitimates I am the most unfortunate and poverty stricken.
To make illegitimate.
First attested in 1536, from Latin illēgitimus, most likely an adapted borrowing of Middle French illegitime, equivalent to il- + legitimate, see -ate (etymology 1, 2 and 3).
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