BEHIND

n. buttocks, rear end, seat

prep. behind, in back of -

adv. late, tardy

Noun
1. the fleshy part of the human body that you sit on; "he deserves a good kick in the butt"; "are you going to sit on your fanny and do nothing?"
(synonym) buttocks, nates, arse, butt, backside, bum, buns, can, fundament, hindquarters, hind end, keister, posterior, prat, rear, rear end, rump, stern, seat, tail, tail end, tooshie, tush, bottom, derriere, fanny, ass
(hypernym) body part
(part-holonym) torso, trunk, body
Adjective
1. having the lower score or lagging position in a contest; "behind by two points"; "the 8th inning found the home team trailing"
(synonym) behind(p), trailing
(similar) down
Adverb
1. in or to or toward the rear; "he followed behind"; "seen from behind, the house is more imposing than it is from the front"; "the final runners were far behind"
2. remaining in a place or condition that has been left or departed from; "when he died he left much unfinished work behind"; "left a large family behind"; "the children left their books behind"; "he took off with a squeal of tires and left the other cars far behind"
3. of timepieces; "the clock is almost an hour slow"; "my watch is running behind"
(synonym) slow
4. in or into an inferior position; "fell behind in his studies"; "their business was lagging behind in the competition for customers"
5. in debt; "he fell behind with his mortgage payments"; "a month behind in the rent"; "a company that has been run behindhand for years"; "in arrears with their utility bills"
(synonym) behindhand, in arrears

(n.)
The backside; the rump.
  

(adv.)
Toward the back part or rear; backward; as, to look behind.
  

(adv.)
Not yet brought forward, produced, or exhibited to view; out of sight; remaining.
  

(adv.)
Backward in time or order of succession; past.
  

(adv.)
At the back part; in the rear.
  

(adv.)
After the departure of another; as, to stay behind.
  

(a.)
On the side opposite the front or nearest part; on the back side of; at the back of; on the other side of; as, behind a door; behind a hill.
  

(a.)
Left after the departure of, whether this be by removing to a distance or by death.
  

(a.)
Left a distance by, in progress of improvement Hence: Inferior to in dignity, rank, knowledge, or excellence, or in any achievement.
  

Used for listed equity securities. At the same price but entered after your order/interest, such as on the specialist's  book. Antithesis of ahead of you.