Lewis & Short

ingressĭo, ōnis, f. [ingredior], a going into, entering (Ciceron.).

  1. I. Lit.: ab ingressione fori, entrance, Cic. Phil. 5, 4, 9.
  2. II. Transf.
    1. A. A gait, pace: interdum cursus est in oratione incitatior, interdum moderata ingressio, Cic. de Or. 59, 201.
    2. B. A beginning: prima ingressio mea, Cic. de Or. 3, 11.