trench in WordNet English dictionary

1. a long steep-sided depression in the ocean floor
   trench  deep  oceanic abyss 
   
2. a ditch dug as a fortification having a parapet of the excavated earth
   trench 
   
3. any long ditch cut in the ground
   trench 
   

1. cut a trench in, as for drainage
   "ditch the land to drain it"; "trench the fields"
   trench  ditch 
   
2. impinge or infringe upon
   "This impinges on my rights as an individual"; "This matter entrenches on other domains"
   impinge  encroach  entrench  trench 
   
3. cut or carve deeply into
   "letters trenched into the stone"
   trench 
   
4. dig a trench or trenches
   "The National Guardsmen were sent out to trench"
   trench 
   
5. fortify by surrounding with trenches
   "He trenched his military camp"
   trench 
   
6. set, plant, or bury in a trench
   "trench the fallen soldiers"; "trench the vegetables"
   trench