A commode can best be described as a movable toilet that does not use running water.
The most basic commodes look much like a chair with a toilet seat and a bucket/container underneath, while more complex wheeled models tend to resemble manual wheelchairs.
The container underneath a commode can be removed for cleaning after use. Commodes are a necessary bathroom aid for those who are mainly confined to their bed, or who do not have enough strength to walk to their bathroom safely.
They can be placed anywhere in the home as they are lightweight and very portable, and they also come with hand rails to help users get on and off the seat comfortably.