A person who has a physical or mental impairment in which the physically built environment or social enviroment makes the person disabled. It puts them at a disadvantage. If the environment was moulded to their needs, then it would not be much of a disability because they would be able to continue life without much hindrance. Of course other minor things can be a hindrance but other people who don't have any specific impairment have the same things e.g. back pain, periods...sometimes the impairment may make those normals things a little more hard to deal with. Just a little.
Sam is a disabled person.

The enviroment makes Sam a disabled person