隅っこ

(1)an interior angle formed by two meeting walls; "a piano was in one corner of the room"

(2)2つの交差する壁で形成される内角

(3)a place off to the side of an area; "he tripled to the rightfield corner"; "the southeastern corner of the Mediterranean"

(4)ある領域の外れの場所

(5)a small concavity

(6)小さな凹面