Across \A*cross"\ (#; 115), prep. [Pref. a- + cross: cf. F. 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.

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.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Across \A*cross"\, adv.

1. From side to side; crosswise; as, with arms folded across. --Shak.

2. Obliquely; athwart; amiss; awry. [Obs.]

The squint-eyed Pharisees look across at all the actions of Christ. --Bp. Hall.

Source: Webster's Revised Unabridged Dictionary (1913)