A person is considered to be legally blind if he or she has a best-corrected vision of 20/200 in their best-seeing eye. Many people feel that they are legally blind because when they remove their glasses or contact lenses, they cannot see a foot in front of their face.
â¢ SHEAR (noun). The noun SHEAR has 2 senses: 1. (physics) a deformation of an object in which parallel planes remain parallel but are shifted in a direction parallel to themselves. 2. a large edge tool that cuts sheet metal by passing a blade through it. Familiarity information: SHEAR used as a noun is rare.â¢ SHEAR (verb). The verb SHEAR has 3 senses: 1. cut with shears. 2. shear the wool from. 3. cut or cut through with shears. Familiarity information: SHEAR used as a verb is uncommon.. a large edge tool that cuts sheet metal by passing a blade through it. Familiarity information: SHEAR used as a noun is rare. â¢ SHEAR (verb). The verb SHEAR has 3 senses: 1. cut with shears. 2. shear the wool from. 3. cut or cut through with shears. Familiarity information: SHEAR used as a verb is uncommon.
Speed Shear. The component of wind shear which is due to a change in wind speed with height, e.g., southwesterly winds of 20 mph at 10,000 feet increasing to 50 mph at 20,000 feet. Speed shear is an important factor in severe weather development, especially in the middle and upper levels of the atmosphere.