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

1. On, in traversing
   "came along the path";
   - by

Encyclopedia: Along, Arunachal Pradesh