1. in, to, or toward the rear: we walked behind.
2. in a place or condition that has been passed or left: I left my gloves behind.
3. in arrears; late: I fell behind in my payments.
4. below the standard level; in or into an inferior position: don't fall behind in class.
5. slow: my watch is running behind.
6. archaic yet to come.
7. at the back of or in the rear of: he sat behind her.
8. on the farther side or other side of; beyond: the broom is behind the door.
9. in a place or time that has been passed or left by: their worries are behind them.
10. later than: the plane was behind schedule.
11. used to indicate deficiency in performance: behind us in technological development.
12. hidden or concealed by: hatred hidden behind a bland smile.
13. in the background of; underlying: behind your every action is self-interest.
14. in a position or attitude of support: the leaders have the army behind them.
15. in pursuit of: the police were hard behind the escapees.
16. informal the buttocks.

1. at the back of
2. to the back of
3. after, time- or motion-wise
4. responsible for
5. in support of
6. at the back part; in the rear.
7. toward the back part or rear; backward; as, to look behind.
8. not yet brought forward, produced, or exhibited to view; out of sight; remaining.
9. backward in time or order of succession; past.
10. after the departure of another; as, to stay behind.
11. behind the scenes in a theatre; backstage.
12. the rear, back-end
13. bottom, downside
14. butt, the buttocks
15. A 1 point score.
16. the catcher.

1. at the back part; in the rear.
2. toward the back part or rear; backward.
3. not yet brought forward, produced, or exhibited to view; out of sight; remaining.
4. backward in time or order of succession; past.
5. after the departure of another.
6. the backside; the rump.
7. on the side opposite the front or nearest part; on the back side of; at the back of; on the other side of.
8. left after the departure of, whether this be by removing to a distance or by death.
9. left a distance by, in progress of improvement hence: inferior to in dignity, rank, knowledge, or excellence, or in any achievement.

1. at the back of some person or thing; in the rear: opposed to before.
2. toward the back part; backward: as, to look behind.
3. out of sight; not produced or exhibited to view; in abeyance or reserve.
4. remaining after some occurrence, action, or operation: as, he departed and left us behind.
5. past in the progress of time.
6. in arrear; behindhand: as, he is behind in his rent.
7. at the back or in the rear of, as regards either the actual or the assumed front: the opposite of before: as, the valet stood behind his master; crouching behind a tree.
8. figuratively, in a position or at a point not so far advanced as; in the rear of, as regards progress, knowledge, development, etc.; not on an equality with: as, behind the age; he is behind the others in mathematics.
9. in existence or remaining after the removal or disappearance of: as, he left a large family behind him.
10.

1. of timepieces
2. in debt
3. having the lower score or lagging position in a contest
4. in or into an inferior position
5. remaining in a place or condition that has been left or departed from
6. in or to or toward the rear
7. the fleshy part of the human body that you sit on