The Collaborative International Dictionary
Trench-plough
Trench-plow \Trench"-plow"\, Trench-plough \Trench"-plough`\ (-plou`), v. t. To plow with deep furrows, for the purpose of loosening the land to a greater depth than usual.
Wiktionary
trench-plough
alt. (context transitive English) To plough with deep furrows, for the purpose of loosening the land to a greater depth than usual. vb. (context transitive English) To plough with deep furrows, for the purpose of loosening the land to a greater depth than usual.