noun
large sword; long sword
Refers to a physically large or long sword, often in fantasy, historical, or gaming contexts. Not a specific historical Japanese sword type.
彼は大剣を背負って旅に出た。
He set out on a journey with a large sword on his back.
ゲームの中で大剣を装備すると攻撃力が上がる。
Equipping a greatsword in the game increases your attack power.