What does "behind" mean?

Behind: Left after the departure of, whether this be by removing to a distance or by death. A small part of what he left behind him. Pope.

Additional senses

  1. 2.Left a distance by, in progress of improvement Hence: Inferior to in dignity, rank, knowledge, or excellence, or in any achievement. I was not a whit behind the very chiefest apostles. 2 Cor. xi.
  2. 3.1. At the back part; in the rear. "I shall not lag behind." Milton.
  3. 4.Toward the back part or rear; backward; as, to look behind.
  4. 5.Not yet brought forward, produced, or exhibited to view; out of sight; remaining. We can not be sure that there is no evidence behind. Locke.
  5. 6.Backward in time or order of succession; past. Forgetting those things which are behind. Phil. ii.
  6. 7.5. After the departure of another; as, to stay behind. Leave not a rack behind. Shak.
  7. 8.The backside; the rump. [Low]

Sources