Final answer:
A dedicated device is opposite to a sharable device and cannot be used concurrently by several processes, it is designed for specific tasks and is rivalrous in consumption.
Step-by-step explanation:
A dedicated device typically refers to hardware that is designed for a specific task and can only be used by one process or user at a time. This means that a dedicated device is generally:
Opposite to a sharable device, because a dedicated device is intended for use by a single user or process, whereas a sharable device can be used by multiple users or processes.
Cannot be used concurrently by several processes, as its resources are allocated to a specific task or user.
Examples would be like how two people cannot use one laptop concurrently given it is rivalrous in consumption, or how it's difficult for two people to eat the same ice cream cone simultaneously.