What does apart mean?
The definition of apart
A*part”, adv.
Etym: [F. à part; (L. ad) + part part. See Part.]

1 Separately, in regard to space or company; in a state of separation as to place; aside. Others apart sat on a hill retired. Milton. The Lord hath set apart him that is godly for himself. Ps. iv. 3.
2 In a state of separation, of exclusion, or of distinction, as to purpose, use, or character, or as a matter of thought; separately; independently; as, consider the two propositions apart.
3 Aside; away. “Wherefore lay apart all filthiness and superfluity of naughtiness.” Jas. i. 21. Let Pleasure go, put Care apart. Keble.
4 In two or more parts; asunder; to piece; as, to take a piece of machinery apart.