1. [n]  direction toward the rear; "his outfit marched to the rearward of the tank divisions"
2. [adv]  at or to or toward or the back or rear; "he moved back"; "tripped when he stepped backward"; "she looked rearward out the window of the car"
3. [adj]  directed or moving toward the rear; "a rearward glance"; "a rearward movement"

REARWARD is a 8 letter word that starts with R.

1. \Rear"ward`\, n. [Rear + ward.]
   The last troop; the rear of an army; a rear guard. Also used
   figuratively. --Shak.
   
   

2. \Rear"ward\, a. & adv.
   At or toward the rear.