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to kill (a human) using a blade (sword, machete, knife, etc.); to slice (off); to lop (off); to cut (off)
侍が刀で敵を斬る場面が印象的だ。
The scene where the samurai slays enemies with a sword is impressive.
時代劇で悪者を斬るシーンが好きだ。
I like scenes where villains are slain in period dramas.
彼は鋭い批評で問題を斬っている。
He cuts through problems with sharp criticism.