Mir·a·cle noun ˈmir-i-kəl picture illustrates the miracle of healing the blind.


A miracle is an unusual or wonderful event that is believed to be caused by the power of God or spiritual presence of God
The common Hebrew word for miracle is nes (נס), which translates as something that is raised up or elevated. 
For example, a flagpole upon which a banner is raised is also called a nes. 


So a miracle is an elevated and elevating event. It is something extraordinary that happens, where we see God’s hand clearly.


: a very amazing or unusual event, thing, or achievement.
<His mean selfish boss gave him a job promotion yesterday>

: an extraordinary event manifesting divine intervention in human affairs
2
: an extremely outstanding or unusual event, thing, or accomplishment.
Yeshua the Jewish rabbi whom the christians call Jesus did a lot of miracles which are written down in the bible.

Christian Science : a divinely natural phenomenon experienced humanly as the fulfillment of spiritual law

A miracle is something that is unnatural which breaks and defies the laws of limitation when it occurs, and thus; it is referred to as a miracle because it goes beyond the finite (defined boundaries, limitations of nature or predictable) law or structure of nature.

There are different types of miracles:

A miracle is unusual event happening in the time when it was not supposed to occur; like snow snowing in spring time or summer time, time of a revolution which brings bought dramatic positive changes in a government of a dictator, the miracles which happened in Egypt during the month of Nissan (Passover).

But It is also considered as miracle when a person who is evil (living in the limitations of his animalistic soul), begins to live a life which benefits the welfare of his community. 

A miracle is something that is impossible which happens for the sake of creating or activating the frequency of possibilities.
<he prayed for a miracle to happen>