behind

American Heritage® Dictionary of the English Language, Fourth Edition

1. adv. In, to, or toward the rear: We walked behind.
2. adv. In a place or condition that has been passed or left: I left my gloves behind.
3. adv. In arrears; late: I fell behind in my payments.
4. adv. Below the standard level; in or into an inferior position: Don't fall behind in class.
5. adv. Slow: My watch is running behind.
6. adv. Archaic Yet to come.
7. prep. At the back of or in the rear of: He sat behind her.
8. prep. On the farther side or other side of; beyond: The broom is behind the door.
9. prep. In a place or time that has been passed or left by: Their worries are behind them.
10. prep. Later than: The plane was behind schedule.
11. prep. Used to indicate deficiency in performance: behind us in technological development.
12. prep. Hidden or concealed by: hatred hidden behind a bland smile.
13. prep. In the background of; underlying: Behind your every action is self-interest.
14. prep. In a position or attitude of support: The leaders have the army behind them.
15. prep. In pursuit of: The police were hard behind the escapees.
16. n. Informal The buttocks.

Century Dictionary and Cyclopedia

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. Synonyms Behind, After. Behind relates primarily to position; after, to time. When after notes position, it is less close or exact than behind, and it means position in motion. To say that men stood one after another in a line was once correct (see Chaucer, knight's Tale, 1. 901, “kneeled … each after other”), but is not so now. They may come one after another, that is, somewhat irregularly and apart; they came one behind another, that is, close together, one covering another. The distinction is similar to that between beneath and below.

Wiktionary

1. prep. at the back of
2. prep. to the back of
3. prep. after, time- or motion-wise
4. prep. responsible for
5. prep. in support of
6. adv. At the back part; in the rear.
7. adv. Toward the back part or rear; backward; as, to look behind.
8. adv. Not yet brought forward, produced, or exhibited to view; out of sight; remaining.
9. adv. Backward in time or order of succession; past.
10. adv. After the departure of another; as, to stay behind.
11. adv. Behind the scenes in a theatre; backstage.
12. n. the rear, back-end
13. n. bottom, downside
14. n. butt, the buttocks
15. n. Australian rules football A 1 point score.
16. n. baseball, slang, 1800s The catcher.

GNU Webster's 1913

1. prep. On the side opposite the front or nearest part; on the back side of; at the back of; on the other side of.
2. prep. Left after the departure of, whether this be by removing to a distance or by death.
3. prep. Left a distance by, in progress of improvement Hence: Inferior to in dignity, rank, knowledge, or excellence, or in any achievement.
4. adv. At the back part; in the rear.
5. adv. Toward the back part or rear; backward.
6. adv. Not yet brought forward, produced, or exhibited to view; out of sight; remaining.
7. adv. Backward in time or order of succession; past.
8. adv. After the departure of another.
9. n. Low The backside; the rump.

WordNet 3.0

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