An extremely powerful typhoon (also in extended use); (Meteorology) a tropical cyclone in the region of the western Pacific Ocean with sustained wind speeds in excess of 130 knots (240 km per hour).
Origin
1940s; earliest use found in The Atlanta Constitution.
Definition of supertyphoon in US English:
supertyphoon
noun
An extremely powerful typhoon (also in extended use); (Meteorology) a tropical cyclone in the region of the western Pacific Ocean with sustained wind speeds in excess of 130 knots (240 km per hour).
Origin
1940s; earliest use found in The Atlanta Constitution.