Webster's Revised Unabridged Dictionary · 1913

Across

Across (#; 115) , preposition

[Prefix a- + cross: compare French en croix. See Cross, n.]

From side to side; athwart; crosswise, or in a direction opposed to the length; quite over; as, a bridge laid across a river. — Dryden
Collocations (2)
To come across , to come upon or meet incidentally. — Freeman
To go across the country , to go by a direct course across a region without following the roads.

Across , adverb

1.
From side to side; crosswise; as, with arms folded across. — Shakespeare
2.
Obliquely; athwart; amiss; awry. [Obsolete]
The squint-eyed Pharisees look across at all the actions of Christ. — Bp. Hall