US: A tropical storm marked by extremely low barometric pressure and circular winds with a velocity of 75 miles an hour or more.
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A violent tropical cyclone with winds of 64 knots or 73 more miles per hour (118 or more km/hr) often with torrential rains and originating usually at sea. A storm of the most intense severity with a violent wind, in particular a tropical cyclone in the Caribbean. Synonyms: Cyclone, typhoon, tornado, storm, tropical storm, tempest, windstorm, superstore, gale, squall, whirlwind. A wind of force 12 on the Beaufort scale (equal or exceeding 64 knots or 118 km/h). Air filled with foam, waves over 45 ft., sea complete white with driving spray, visibility greatly reduced.
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UK: A violent windstorm covering a large area. It usually originates at sea, with winds circulating at tremendous velocity around a ‘centre’ that in itself moves fairly slowly. In view of its range in time and space, hurricanes are brought within the hours clause in catastrophe excess of loss treaties.