n. 1. An ample amount or quantity; an abundance: a region blessed with a plenitude of natural resources. 2. The condition of being full, ample, or complete. [Middle English, from Old French, from Latin plēnitūdō, from plēnus, full; see pelə-1 in the Appendix of Indo-European roots.] plen′i·tudi·nous (-tdn-əs, -tyd-) adj. |
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