1.a ditch dug as a fortification having a parapet of the excavated earth
2.a long steep-sided depression in the ocean floor
3.any long ditch cut in the ground
1.impinge or infringe upon;
This impinges on my rights as an individual
2.fortify by surrounding with trenches;
He trenched his military camp
3.cut or carve deeply into;
letters trenched into the stone
4.set, plant, or bury in a trench;
trench the fallen soldiers
5.cut a trench in, as for drainage;
ditch the land to drain it
6.dig a trench or trenches;
The National Guardsmen were sent out to trench