- The definition of a cataract is a flood, waterfall or rush of water, or an eye disease when the lens becomes opaque, causing partial or total blindness.
- An example of a cataract is Niagara Falls.
- An example of a cataract is an eye problem where the lens in an older person's eye gets cloudy causing vision issues.
A cataract is a large waterfall.
- a large waterfall
- any strong flood or rush of water; deluge
- an eye disease in which the crystalline lens or its capsule becomes opaque, causing partial or total blindness
- the opaque area
Origin of cataractMiddle English cataracte, floodgate (of heaven), cataract (of the eye) ; from Classical Latin cataracta, a waterfall, portcullis ; from Classical Greek katarhaktēs ; from katarhassein, to dash down ; from kata-, down + rhassein, to strike or uncertain or unknown; perhaps arassein, to smite
- A large or high waterfall.
- A great downpour; a deluge.
- Medicine Opacity of the lens or capsule of the eye, causing impairment of vision or blindness.
Origin of cataractMiddle English cataracte, from Old French, from Latin cataracta, from Greek katarraktēs, kataraktēs, downrush, waterfall, portcullis, probably from katarassein, to dash down (kat-, kata-, cata- + arassein, to strike). Sense 3, from a comparison to a portcullis or other falling impediment or covering.
From Latin cataracta 'waterfall, portcullis', from Ancient Greek καταράκτης (kataraktēs), from καταράσσω (katarassō, “I pour down”).