reinˈtrench,v. [re- 5 a.] trans. To entrench again. 1650T. Bayly Herba Parietis 22 They saw the prince stand bulwarckt in the midst of so many slaughter'd Moores: and re-intrenched about with his owne dead.1899Rev. of Reviews Mar. 259 Masses of..troops reintrenched themselves.