A Quick and Simple Dictionary

across

1. Preposition.  To, toward(,) or from the far side of (something that lies between two points of interest).
2. Preposition.  On the opposite side of (something that lies between two points of interest).
3. Preposition.  (Southern US, AAVE) On the opposite side, relative to something that lies between, from (a point of interest).
4. Preposition.  From one side to the other within (a space being traversed).
5. Preposition.  At or near the far end of (a space).
6. Preposition.  Spanning.
7. Preposition.  Throughout,.
8. Preposition.  So as to intersect or pass through or over at an angle.
9. Adverb.  From one side to the other.
10. Adverb.  On the other side.
11. Adverb.  In a particular direction.
12. Adverb.  (context, crosswords) Horizontally.
13. Noun.  (context, crosswords) A clue whose solution runs horizontally in the grid.