adj.
1.moving from east to west on the celestial sphere
2.of amnesia
3.going from better to worse
4.moving or directed or tending in a backward direction or contrary to a previous direction retrograde v.
1.move backward in an orbit, of celestial bodies
2.move in a direction contrary to the usual one
3.move back
4.go back over
5.get worse
Idiom of the Day
get even (with someone)
to get revenge on someone
My sister wants to get even with her friend for being late for the concert.