The definition of a cad is a male who behaves badly.(noun)
An example of a cad is a ladies’ man who breaks hearts.
The definition of CAD is computer-aided design, often used for architectural and industrial design.(abbreviation)
An example of CAD is the program used to draft blueprints for a house.
See cad in Webster's New World College Dictionary
Origin: < caddie & cadet: orig. applied to servants, then to town boys, by students at British universities and public schools
See cad in American Heritage Dictionary 4
Origin: Short for caddie.
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