Retrograde \Re"tro*grade\, v. i. [imp. & p. p. {Retrograded}; p. pr. & vb. n. {Retrograding}.] [L. retrogradare, retrogradi: cf. F. r['e]trograder.] 1. To go in a retrograde direction; to move, or appear to move, backward, as a planet. [1913 Webster] 2. Hence, to decline from a better to a worse condition, as in morals or intelligence. [1913 Webster]