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1. Lacking kindness, pity, or compassion; cruel or indifferent: inhuman treatment of the prisoners.
2. Not suited for human needs: "The monks sat ... in inhuman quiet" (Maura O'Halloran).
3. Not of ordinary human nature, form, or character: "The woman ... lets out a squeal, a strange pig-squeal, completely inhuman" (Ashley Warlick).

in·hu′man·ly adv.
in·hu′man·ness n.
References in classic literature ?
ADAM was all in tears, and to his guide Lamenting turnd full sad; O what are these, Deaths Ministers, not Men, who thus deal Death Inhumanly to men, and multiply Ten thousand fould the sin of him who slew His Brother; for of whom such massacher Make they but of thir Brethren, men of men?
She is eighteen years of age, and has been sent to Brussels to finish her education; she is of middle size, stiffly made, body long, legs short, bust much developed but not compactly moulded, waist disproportionately compressed by an inhumanly braced corset, dress carefully arranged, large feet tortured into small bottines, head small, hair smoothed, braided, oiled, and gummed to perfection; very low forehead, very diminutive and vindictive grey eyes, somewhat Tartar features, rather flat nose, rather high-cheek bones, yet the ensemble not positively ugly; tolerably good complexion.
The usage on board of her was tyrannical; the sick had been inhumanly neglected; the provisions had been doled out in scanty allowance; and her cruises were unreasonably protracted.
However, if these good Haudriettes were, for the moment, complying with the statutes of Pierre d'Ailly, they certainly violated with joy those of Michel de Brache, and the Cardinal of Pisa, which so inhumanly enjoined silence upon them.
who is an Infante likewise, and whom France detains inhumanly.
He demanded compensation for some fancied injury, would hear nothing of the valuable dog he had killed or the window he had broken, obliged Grubb by sheer physical obduracy to straighten his buckled front wheel, and pestered the struggling firm with a series of inhumanly worded solicitor's letters.
He could not tell them what we say now: "Why fight, why block the road, losing our own men and inhumanly slaughtering unfortunate wretches?
He stands far apart from us, and is almost inhumanly cold.
You will say that I do not allow them to be severely treated; but I will put it to you whether you believe that it can be a general practice to treat them inhumanly, when it would impair their value, and would be obviously against the interests of their masters.
Sometimes, though, he is not at all morbid, but simply cold and inhumanly callous; it's as though he were alternating between two characters.
Just as I find it difficult not to view the calculating way Mary Bell offered her sympathy to the parents of the boy she'd just suffocated - leaving her initials carved on his body - as the act of an inhumanly wicked person.
The process described by the experts, in which the man dutifully does the rounds of the erogenous zones, spends an equal amount of time on each nipple, turns his attention to the clitoris (usually too directly), leads through the stages of digital and lingual stimulation and then politely lets himself into the vagina, is laborious and inhumanly computerized (p.