#1 entrench v. [intrench] fix firmly or securely. wn
#2 entrench v. [impinge, encroach, trench] impinge or infringe upon; "This impinges on my rights as an individual"; "This matter entrenches on other domains". wn
#3 entrench v. [dig in] occupy a trench or secured area; "The troops dug in for the night". wn
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