“Mind” is an abstract term. Mind is not the name of any physical thing. Word “Mind” is different from word “Brain”. “Brain” is the name of a physical thing.
In most simple terms, Mind is sum total of knowledge, information, opinions and attitudes of a person. Mind is conscious of itself.
Relationship of mind and brain is that of software and hardware. But brain is not based on binary technology. Therefore nature of mind is different from the nature of computer softwares. For example, if most basic element in computer software is “data”, then most basic element of mind is not data … the most basic element of mind is “information” i.e. a “proposition”.
Mind gets basic input of “information”. Mind organizes this information in various styles. And the so “organized” information is the “knowledge”.