lessen (lessens 3rd person present) (lessening present participle) (lessened past tense & past participle) If something lessens or you lessen it, it becomes smaller in size, amount, degree, or importance.
A look back at Hurricane Camille. Hurricane Camille, the USA's second strongest 20th century hurricane, hit the Gulf Coast in 1969. Camille became a hurricane on Aug. 15, 1969 south of Cuba and began quickly growing that night as it moved into the Gulf of Mexico. look back at Hurricane Camille. Hurricane Camille, the USA's second strongest 20th century hurricane, hit the Gulf Coast in 1969. Camille became a hurricane on Aug. 15, 1969 south of Cuba and began quickly growing that night as it moved into the Gulf of Mexico.
Hurricane Irene formed from a tropical wave on August 21, 2011 in the tropical Atlantic Ocean. It moved west-northwestward, and within an environment of light wind shear and warm waters. Shortly before becoming a hurricane, Irene struck Puerto Rico as a tropical storm. Thereafter, it steadily strengthened to reach peak winds of 120 mph (195 km/h) on August 24. Irene then gradually weakened and made landfall on the Outer Banks of North Carolina with winds of 85 mph (140 km/h) on August 27.