"mageddon" has no meaning in Hebrew.
Additional Answer:
You are probably referring to ' har megiddo' which means
Mountain of Megiddo and is used once in the New Testament in the
form of Armageddon. Megiddo is actually a 'tel' and not a mountain.
It was a famous crossroads which saw many battles in its history.
It will be the final 'staging' place of the enormous end-time Army
of 200 million men in the Book of Revelation.