Lying on the back, or with the face upward: opposed to prone.
Leaning backward; inclined; sloping: said of localities.
Negligent; listless; heedless; indolent; thoughtless; inattentive; careless.
In botany, lying flat with the face upward, as sometimes a thallus or leaf.
noun.
A part of the Latin verb, really a verbal noun, similar to the English verbals in -ing, with two cases.
Supinely.