Jaimee Grubbs, courtesy of US magazine.

Main Entry: trans·gres·sion
Pronunciation: \-ˈgre-shən\
Function: noun
Date: 14th century

: an act, process, or instance of transgressing: as a : infringement or violation of a law, command, or duty b : the spread of the sea over land areas and the consequent unconformable deposit of sediments on older rocks