Definition of entrench
transitive verb
1 a
:to place within or surround with a trench especially for defense
b
:to place (oneself) in a strong defensive position
c
:to establish solidly
- entrenched themselves in the business
2
:to cut into :furrow;
specifically
:to erode downward so as to form a trench
intransitive verb
1
:to dig or occupy a trench for defensive purposes
2
:to enter upon or take over something unfairly, improperly, or unlawfully :encroach
—used with on or upon
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