b. Of (the posture or attitude of) a person or animal: such that the belly is next to the ground, or lies beneath the body; lying face downwards or on one's belly; bending forward and downward; facing downwards. Also fig. Cf. prostrate adj. 1a.
In strict use opposed to supine. In later use freq. more generally with reference to lying horizontal, or on the ground, without specific implication as to bodily posture.
c. Of something usually erect or standing, as a tower, column, etc.: lying flat, or in a horizontal position; that has fallen down or been cut down. Cf. prostrate adj. 1b.