Used in many compound words (e.g., ヘッドコーチ, ヘッドライト) and as a standalone noun for the top part or leader of something.
彼はプロジェクトのヘッドに任命された。
He was appointed head of the project.
He became the head of the new department.
このギターのヘッドの形が気に入っている。
I like the shape of this guitar's headstock.
彼女はプロジェクトのヘッドを務めている。
She is serving as the head of the project.
I replaced the printer's head.
headlight (vehicle) · headlamp; head torch
head spa treatment · head spa salon
head coach
headrest
flying height; head gap
Borrowed from English 'head'.