This type of cabinet can be modified to suit the needs of the interior; this can be a wall, base or standalone cabinet. Also known as a semi-custom cabinet.
Modular cabinets come pre-made, either fully assembled or pre-assembled, that is not specifically built to your kitchen, but can add needed storage to your interior. Modular cabinets tend to be less expensive but work in a variety of interiors. The direct opposite of this is a custom cabinet, where a cabinet is tailored to the dimensions of your room.