Removable means capable of being taken off, detached, or taken out without causing damage. A removable battery in a flashlight can be taken out and replaced when it dies. The cushions on many couches are removable so you can clean underneath them or wash the covers.

Think about the difference between removable and permanent. A removable brace on your teeth can be taken out for meals and cleaning, while traditional braces stay fixed to your teeth until the orthodontist removes them. A removable hard drive plugs into your computer and can be unplugged and carried away, unlike the built-in drive inside.

The word suggests something was designed to come apart easily when needed. A notebook with removable pages has perforations that let you tear pages out cleanly. Scientists studying wild animals often attach removable tracking collars that can be taken off later without harming the animal.

When something is removable, you have flexibility. You can take it off when you don't need it, clean it separately, replace it if it wears out, or swap it for something different.