The Biblical Description of Miracles.
Three Greek words are used for the word miracle:
"Semeion." A "Sign"  (used 78 times).  Jesus speaks of  his resurrection as a "sign".
 
Matthew 12:39
He said to them in reply, "An evil and unfaithful  generation seeks a sign, but no sign will be given it except the sign of Jonah the prophet.
"Semeion" was  an event with divine significance.      
"Teras". A "wonder"  (used 16 times).  It is also used in combination with "semeion".