Lewis & Short

conventĭo, ōnis, f. [convenio], a meeting, assembling.

  1. I. In gen. (very rare), Cod. Th. 8, 8, 3; 16, 2, 14 al.
  2. II. Esp.
    1. A. = contio, an assembly, meeting (very rare), Varr. L. L. 6, § 87 sq. Müll.; cf. Paul. ex Fest. p. 113, 10: in conventione = in contione.
    2. B. Agreement, covenant, convention, compact, Dig. 2, 14, 1 sq.; Liv. 27, 30, 12; Sen. Ira, 3, 26, 4; Plin. Ep. 5, 1, 2; Tac. H. 3, 70 al.
    3. C. In manum conventio, of a woman, the coming into the hands (manus) of her husband by marriage, Gai Inst. 3, 24; Ulp. Fragm. 26, 7; cf. convenio, I. B. 2.
    4. D. A judicial proceeding against one, indictment, charge (very rare): personae, Cod. Just. 3, 6, 3 al.