Lewis & Short

plēnĭtas, ātis, f. [plenus], a being full, fulness, repletion (post-Aug.).

  1. I. Lit.: nubes propter plenitatem et gravitatem liquescendo disperguntur, Vitr. 8, 2, 2; 5, 9, 5.
  2. II. Transf., abundance, copiousness: humoris plenitas, Vitr. 6, 1, 3.