Nikon lens 18 - 55 mm means Millimeter or Meters ??

Gosh! Even if you don't use metric over there, which word has two m's?

If it were metres you would not have the strength to carry the lens!

mm is the SI abbreviation of millimetre.
1 metre = 1000 millimetres

... whew ....

1 meter is almost 3 feet . You do the math .

mm. the lens focal length ranges from 0-71 - 2.165 inches.

Mega Meters maybe? .... It is Millimeters

m = meters mm=millimeters a 55 meter lens would probably be 55 * 39 inches long approx 180 feet long they can reduce that using mirror lenses and fold the path back and forth..