What Does cv-qualified Mean?

c-v qualified means const and volatile...For e.g:-

// non cv_qualified 
int first; 
char *second; 

// cv-qualified 
const int third; 
volatile char * fourth;

c in cv means const and v means volatile.

From the C++ Standard (3.9.3 CV-qualifiers)

The term object type (1.8) includes the cv-qualifiers specified in the decl-specifier-seq (7.1), declarator (Clause 8), type-id (8.1), or newtype - id (5.3.4) when the object is created.
A const object is an object of type const T or a non-mutable subobject of such an object.
A volatile object is an object of type volatile T, a subobject of such an object, or a mutable subobject of a const volatile object.
A const volatile object is an object of type const volatile T, a non-mutable subobject of such an object, a const subobject of a volatile object, or a non-mutable volatile subobject of a const object.

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