along in WordNet English dictionary

1. in accompaniment or as a companion
   "his little sister came along to the movies"; "I brought my camera along"; "working along with his father"
   along  along 
   
2. with a forward motion
   "we drove along admiring the view"; "the horse trotted along at a steady pace"; "the circus traveled on to the next city"; "move along"; "march on"
   along  on  along  on 
   
3. in addition (usually followed by `with')
   "we sent them food and some clothing went along in the package"; "along with the package came a bill"; "consider the advantages along with the disadvantages"
   along  along 
   
4. to a more advanced state
   "the work is moving along"; "well along in their research"; "hurrying their education along"; "getting along in years"
   along  along 
   
5. in line with a length or direction (often followed by `by' or `beside')
   "pass the word along"; "ran along beside me"; "cottages along by the river"
   along  along