Entrenchment, Entrenched or Entrench may refer to: A trench Entrenchment (fortification), a type of fortification Military trenches with relation to Trench warfare, especially that of World War I An entrenchment clause within a constitution, a clause impervious to or somewhat shielded from the amendment process. Entrenchment hypothesis, in financial theory The process forming an Entrenched river, a process of erosion Entrench (album), a 2013 album by the Canadian band KEN mode