Lewis & Short

1. gestĭo, ōnis, f. [gero].

  1. I. A managing, doing, performing (perh. only in the foll. passages; syn.: actio, administratio): in gestione autem negotii, etc., Cic. Inv. 1, 26, 38; cf. id. ib. 2, 12, 39.
  2. II. A behaving, acting in any manner, Dig. 11, 7, 14, § 8.