1. [adv]  transversely; "the marble slabs were cut across"
2. [adv]  to the opposite side; "the football field was 300 feet across"
3. [adv]  in such a manner as to be understood and accepted; "she cannot get her ideas across"
4. [adj]  placed crosswise; "spoken with a straight face but crossed fingers"; "crossed forks"; "seated with arms across"

ACROSS is a 6 letter word that starts with A.

1. \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.
   

2. \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.