Su‐pine″ (sū̍‐pīn″), a. [L. supinus, akin to sub under, super above. Cf. Sub-, Super-.] 1. Lying on the back, or with the face upward; — opposed to prone.
2. Leaning backward, or inclining with exposure to the sun; sloping; inclined.
If the vine
On rising ground be placed, or hills supine. Dryden.
3. Negligent; heedless; indolent; listless.
He became pusillanimous and supine, and openly exposed to any temptation. Woodward.
Syn. — Negligent; heedless; indolent; thoughtless; inattentive; listless; careless; drowsy.
— Su‐pine″ly, adv. — Su‐pine″ness, n.