the GNU version of the Collaborative International Dictionary of English
adj. Having no father; fatherless; hence, born contrary to nature.
adj. Having no acknowledged father; hence, illegitimate; spurious; bastard.
The Century Dictionary and Cyclopedia
Having no father; fatherless; hence, produced contrary to the course of nature. Not acknowledged by its father; having no acknowledged father, as an illegitimate child: used figuratively; as, an unfathered proposition.
Word Usage
"Still more remarkable is the historically unfathered impulse of the Jewish nation to set about eliminating participation by quite other methods than those of alpha-thinking [that is, of thinking about things]."