Definitions of middle:

• noun:   the middle area of the human torso (usually in front)
• noun:   an intermediate part or section

  Example: "A whole is that which has beginning, middle, and end- Aristotle"

• noun:   time between the beginning and the end of a temporal period

  Example: "The middle of the war"

• noun:   an area that is approximately central within some larger region
• verb:   put in the middle
• adjective:   between an earlier and a later period of time

  Example: "In the middle years"

• adjective:   of a stage in the development of a language or literature between earlier and later stages

  Example: "Middle English is the English language from about 1100 to 1500"

• adjective:   being neither at the beginning nor at the end in a series

  Example: "The middle point on a line"