—prep.
1 from one end to the other end of (a handkerchief with lace along the edge).
2 on or through any part of the length of (was walking along the road).
3 beside or through the length of (shelves stood along the wall).
—adv.
1 onward; into a more advanced state (come along; getting along nicely).
2 at or to a particular place; arriving (I'll be along soon).
3 in company with a person, esp. oneself (bring a book along).
4 beside or through part or the whole length of a thing.
Phrases and idioms:
along with in addition to; together with.
Etymology: OE andlang f. WG, rel. to LONG(1)
Useful english dictionary. 2012.