praegressĭo, ōnis, f. [praegredior], a going before, preceding.
I Lit.: errantium stellarum cursus, praegressiones, etc., Cic. Tusc. 1, 25, 62.—
II Meton., precedence : causae, Cic. Fat. 19, 44.
praegressiō ōnis, f prae+GRAD-, a going before, preceding : stellarum.—Fig., precedence : causae....
An Elementary Latin Dictionary