adj. 1. Lying with the front or face downward. 2. Having a tendency; inclined. Often used in combination: paper that is prone to yellowing; an accident-prone child. adv. In a prone manner: The patient was lying prone on the bed. [Middle English, inclined, disposed, from Latin prōnus, leaning forward; see per1 in the Appendix of Indo-European roots.] pronely adv. proneness n. |
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