In today's TPOM, we will examine two essential concepts that are at the heart of everything we, as humans, encounter. In reality, everything we experience or interact with, either in thought or physical space, will be functional or dysfunctional. This designation depends upon the point of view, approach vector, particular problem set, and the local or distal time-based context through which it is understood, whatever those may be at any given moment in time.
Function
"An activity or mode of operation that is proper or natural to a person or thing; the purpose or intended role of a thing." OED.
"A specific action performed by an organ or other part of the body of a living organism; the activity that is special, normal, or proper to an organ or other part of the body of a living organism. Also: the action of functioning in this way." OED.
"The use or purpose of something. " APA Dictionary.