Definition of "across"

To, toward, or from the far side of (something that lies between two points of interest).  examples

On the opposite side of (something that lies between two points of interest).  examples

(Southern US, African-American Vernacular) across from: on the opposite side, relative to something that lies between, from (a point of interest).  quotations  examples

From one side to the other within (a space being traversed).  quotations  examples

At or near the far end of (a space).  quotations  examples

Spanning.  examples

Throughout.  quotations  examples

So as to intersect or pass through or over at an angle.  quotations  examples

In possession of full, up-to-date information about; abreast of.  quotations  examples

From one side to the other.  quotations  examples

On the other side.  examples

In a particular direction.  examples

(crosswords) Horizontally.  examples

(crosswords, often in combination) A word that runs horizontally in the completed puzzle grid or its associated clue.  examples