noun
also in·trench·ment -chmənt
( -s )
1.
a. : the act of entrenching
used this delay for the entrenchment of the town
b. : the condition of being entrenched
2.
a. : a defensive work consisting of a trench and a parapet
b. : any defense or protection
municipal government is usually regarded as one of the great entrenchments of democracy — R.M.Dawson
3. obsolete : encroachment , infringement
4.
a. : the process whereby streams become incised, ingrown, or entrenched
b. : the results of this process