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 (so͞o′pīn′, so͞o-pīn′)
1. Lying on the back or having the face upward.
2. Having the palm upward. Used of the hand.
3. Marked by or showing lethargy, passivity, or blameworthy indifference: "No other colony showed such supine, selfish helplessness in allowing her own border citizens to be mercilessly harried" (Theodore Roosevelt).
In Latin grammar, a verbal noun used in only a few syntactic constructions and occurring in only two cases, an accusative in -tum or -sum and an ablative in -tū or -sū. The accusative form of the supine is sometimes considered to be the fourth principal part of the Latin verb.

[Middle English supin, Latin verbal noun, from Late Latin supīnum (verbum), (verb) lying on its back, (verb) going back, neuter of Latin supīnus; see upo in Indo-European roots.]

su·pine′ly adv.
su·pine′ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adv.1.supinely - with the face upward; "she was stretched supinely on her back"
2.supinely - in an indifferently supine manner; "he called the tune to me and I supinely took it up"
References in classic literature ?
Towards the second evening she reached the irregular chalk table-land or plateau, bosomed with semi-globular tumuli--as if Cybele the Many-breasted were supinely extended there--which stretched between the valley of her birth and the valley of her love.
I owed no fealty to the Jeddak of Kaol, but he was of the same race of noble red men as my own princess, and I would not stand supinely by and see his warriors butchered by the cruel and heartless demons of the waste places of Barsoom.
He believed that he was going to his death, for mighty as were his thews he knew that in the face of the horde they would avail him little, yet he saw no other way than to sit supinely by while the girl went to her doom, and that he could not do.
There would seem to me to be about one chance in several million that we shall succeed--otherwise we shall die more quickly but no more surely than as though we sat supinely waiting for the torture of a slow and horrible death.
In the jungle one would scarcely stand supinely aside while another took his mate.
He gave no sign; but when the low step gliding along the curbstone came to his feet he dodged in skilfully in front of the big turning wheel, and spoke up through the little trap door almost before the man gazing supinely ahead from his perch was aware of having been boarded by a fare.
She acted supinely just as Dauris must have assumed, predicted and promised his government.
We] as an Association will not sit supinely and allow our members ride commercial vehicles or use their own vehicles to take up assignments in places like Lofa, Grand Gedeh, River Gee, among others,' Judge Roosevelt Z.
Unfortunately, our president, constantly facing false charges of racism, cannot attack the new Nazis, as Winston Churchill, did the old ones, when he spoke of how "the civilized world so foolishly, so supinely, so insensately allowed the Nazi gangsters to build up, year by year from almost nothing.
where people lie supinely on their backs doing nothing to halt the gradual death of democracy in the country, and finally,
The rat was anesthetized with isoflurane, placed supinely and fixed to keep constant position.
Furthermore, Congress did its reputation no favors by accepting it supinely as presidents unleashed extraordinary rendition, detentions at Guantanamo, enhanced interrogation, and extralegal mass surveillance.