Lewis & Short

praegressĭo, ōnis, f. [praegredior], a going before, preceding.

  1. I. Lit.: errantium stellarum cursus, praegressiones, etc., Cic. Tusc. 1, 25, 62.
  2. II. Meton., precedence: causae, Cic. Fat. 19, 44.