Middle-earth is the setting of much of J. R. R. Tolkien's legendarium. The term is equivalent to the term Midgard of Norse mythology, describing the human-inhabited world, i.e. the central continent of world of Tolkien's imagined mythological past. Tolkien's most widely read works, The Hobbit and The Lord of the Rings take place entirely in Middle-earth, and Middle-earth has also become a short-hand to refer to the legendarium or its "fictional-universe".
Within his stories, Tolkien translated the name "Middle-earth" as Endor (or sometimes Endórë) and Ennor in the Elvish languages Quenya and Sindarin respectively, sometimes referring only to the continent that the stories take place on, with another southern continent called the Dark Land.
Middle-earth is the central continent of Earth (Arda) in an imaginary period of the Earth's past (Tolkien placed the end of the Third Age at about 6,000 years before his own time), in the sense of a "secondary or sub-creational reality". Its general position is reminiscent of Europe, with the environs of the Shire intended to be reminiscent of England (more specifically, the West Midlands, with Hobbiton set at the same latitude as Oxford).
I am what the heart can only discover
I bleed for you
And now nothing but a painful reminder
Can't feel for you
Lost in a predicament
Can't help but experiment
With the other
Anticipate for another time
Lost in the maze of my mind
But you don't
And yet you won't
I see all the pouring rain around me
Yet I don't feel a thing
In time realize
Don't bother to stop and think
That sometimes when you can't be right
Got to find time to change the mind of another
But if you think that you might want to be
Don't hesitate to contain
But you don't
And yet you won't
Bleed my hands are still
See your face and so I
Leave this all for you
Until I bleed my hands are still
See you face and so I
Leave this all for you, down again
It's all in the face
It's all in the face
It's all in the face
Don't walk away
See my lie
But if it's too cold then you'll understand next time
So what's your hand and what's your ace