supine

IPA: sʌpˈaɪn

(grammar, also attributively) In Latin and other languages: a type of verbal noun used in the ablative and accusative cases, which shares the same stem as the passive participle.
(grammar, also attributively) In Swedish, Faroese, Icelandic and Old Norse: a verb form that combines with an inflection of ha/hafa/hava to form the present perfect and pluperfect tenses.
(grammar, also attributively) (obsolete terminology) The 'to'-prefixed infinitive in English or other Germanic languages, so named because the infinitive was regarded as a verbal noun and the 'to'-prefixed form of it was seen as the dative form of the verbal noun; the full infinitive.

Lying on its back.
(of the hand, forearm or foot) Turned facing toward the body or upward: with the thumb outward (palm up), or with the big toe raised relative to the little toe.
(figuratively) Reluctant to take action due to indifference or moral weakness; apathetic or passive towards something.
(rare, now poetic) Inclining or leaning backward; inclined, sloping.

Examples of "supine" in Sentences

The patient lay supine on the hospital bed, waiting for the doctor to come in
He gazed up at the stars while lying supine on the grassy hill
The yoga instructor instructed the class to lie supine for the final relaxation pose
She preferred to sleep in a supine position, with her arms stretched out above her head
The supine position is recommended for proper breathing and spinal alignment during exercise