from one side to the other of

a bridge across a river.

on or to the other side of; beyond

across the sea.

into contact with; into the presence of, usually by accident

to come across an old friend; to run across a first edition of Byron.

crosswise of or transversely to the length of something; athwart

coats across the bed; straddled across the boundary line.

from one side to another.

on the other side

We'll soon be across.

crosswise; transversely

with arms across.

so as to be understood or learned

He couldn't get the idea across to the class.

into a desired or successful state

to put a business deal across.

being in a crossed or transverse position; crosswise

an across pattern of supporting beams.

preposition

athwart , beyond , cross , crossed , crosswise , opposite , over , transversely