HiFi vs MidFi


I’m a relative noob to the audiophile scene, having just invested in an integrated amp and upscale (for me) speakers.  From time to time, I hear the term “MidFi” for some components.  Is there an objective or just largely accepted definition for this term?  I’d be curious to hear feedback on what constitutes HiFi vs. MidFi across various components.  
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mahgister, not doubting your claims re totality of listening experience,  but surely you would agree that some components achieve better resolution than others, that some move more air than others, and that these differences are audible?
mahgister, not doubting your claims re totality of listening experience, but surely you would agree that some components achieve better resolution than others, that some move more air than others, and that these differences are audible?
Yes you are completely right....There is a difference between A Sansui Amplifier of the golden Era and many other amplifier not so well designed for example...

My point is ONLY that acoustic control and treatment, if they NEVER coud replace the NECESSITY for  good designed produts by themselves, will anyway by themselves give you this 50 % of the S.Q. that NO GEAR could do by itself alone....( This % is a "metaphor" conveying my message not a measurable fact but this % mirror my own experience )

Acoustic is the queen and the working gear are the 7 little working dwarves...
Perhaps think of this analogy.    

Consider MidFi like watching Avatar on DVD and HiFi like watching it on BluRay.    

Until you know the difference, you are loving the experience. But once the Pandora's box of HiFi is opened, there is no going back.