NLP - What is NLP - Neuro Linguistic Programing 

Defining NLP (Neuro Linguistic Programing) should be easy, yet it defies definition because NLP means different things to different people.  Let me present some common definitions first, then I will attempt a reconciliations these.

NLP Definition - Dictionary Denotation 

Here we run into our first roadblock - no two dictionaries have the same definition of NLP, nor can other sources agree.

Nevertheless, let's try Dictionary.com: NLP = Neurolinguistic Programming = 

a method of modifying cognitive patterns, emotions, and behaviors, typically, self-improvement through learned imitation of the thoughts, feelings, and actions of high achievers or other successful models of a specific desired behavior.

(https://www.dictionary.com/browse/neurolinguistic-programming)

Some interesting points to notice.

1. Neurolinguistic is presented as one word instead of two.
2. Programming has the British (2 m) spelling, instead of 'programing'.
3. It is presented as a 'method', singular, instead of plural or something bigger.
4. Other parts of the definition also are very limiting and boundary forming.

NLP Definition - Historical Connotations 

Here is what some NLP gurus have said about it.

The ability to master your own states by running your own brain – Richard Bandler

The study of excellence and how to reproduce it – John Grinder

An attitude (wanton curiosity) and methodology (modelling) that leaves behind a trail of techniques – Richard Bandler

How to use the language of the mind to consistently achieve our specific and desired outcomes – Tad James

While these are not well-formed definitions, they do bring in some depth and color to our understanding.

Maybe a good holistic approach would be to define NLP by defining the three parts N, L, and P.

Neuro – nervous system – so using the mind and sensory organs 

Linguistic - communication system - so using sounds (language), pictures, feelings (sensory), tastes (gustatory), smells (olfactory), thoughts (self-talk)

Programming – pattern coding system - sequences of instructions in our minds

As before, not a well-formed definition, but insightful and informative.

NLP Definition - Summary 

Personally, I have found there is not a single definition which will satisfy all NLP practitioners, and provide a single well-formed succinct statement answering the question "what is NLP".