>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
Entrenched Player's Dilemma, a concept featured in Wikinomics
The process forming an Entrenched river, a process of erosion