break-in

from WordNet (r) 3.0 (2006)

break-in
    n 1: trespassing for an unlawful purpose; illegal entrance into
         premises with criminal intent [syn: {housebreaking},
         {break-in}, {breaking and entering}]

from The Collaborative International Dictionary of English v.0.48

break-in \break-in\ n.
   an act of trespassing into a closed structure such as a house
   or place of busineess for an unlawful purpose, usually as
   part of a burglary.

   Syn: housebreaking, breaking and entering.
        [WordNet 1.5 +PJC]