Definition of "Trench" :

noun: a ditch dug as a fortification having a parapet of the excavated earth

noun: any long ditch cut in the ground

noun: a long steep-sided depression in the ocean floor

verb: dig a trench or trenches

"The National Guardsmen were sent out to trench."

verb: cut a trench in, as for drainage

"Trench the fields."

verb: set, plant, or bury in a trench

"Trench the fallen soldiers."

verb: cut or carve deeply into

"Letters trenched into the stone."

verb: fortify by surrounding with trenches

"He trenched his military camp."

verb: impinge or infringe upon

"This matter entrenches on other domains."