noun
overlocker; overlock sewing machine
A sewing machine that trims and encloses the seam allowance in a single pass, creating a clean edge. Wasei-eigo from English 'overlock machine'.
wasei-eigo (Japanese-coined English), from overlock machine
オーバーロックミシンを使うと、布端の始末がきれいにできる。
Using an overlocker, you can finish the raw edges of fabric neatly.
Variant with interpunct; less common but still seen.
Wasei-eigo from English 'overlock machine'. The term was borrowed and adapted into Japanese, where it refers specifically to a serger or overlocker.