Meaning of retrograde

Definition of retrograde

(adj) moving from east to west on the celestial sphere; or--for planets--around the sun in a direction opposite to that of the Earth
going from better to worse
(verb) move backward in an orbit, of celestial bodies
move in a direction contrary to the usual one; "retrograding planets"
move back; "The glacier retrogrades"
go back over; "retrograde arguments"

Other information on retrograde

WIKIPEDIA results for retrograde
Amazon results for retrograde