Definitions for "Supine"
Keywords:  lying, upward, prone, recumbent, dorsum
adjective, Latin supinus, recumbent on the back. Hence, also, the position of the hand with the dorsum facing posteriorly.
Sleeping on back.
Lying flat, face upwards.
offering no resistance; "resistless hostages"; "No other colony showed such supine, selfish helplessness in allowing her own border citizens to be mercilessly harried"- Theodore Roosevelt
Negligent; heedless; indolent; listless.
A verbal noun; or (according to C.F.Becker), a case of the infinitive mood ending in -um and -u, that in -um being sometimes called the former supine, and that in -u the latter supine.
Leaning backward, or inclining with exposure to the sun; sloping; inclined.
Keywords:  verb, languages, appear, form, may
a form in which a verb may appear in some languages