The difference between Derivative and Unoriginal

When used as adjectives, derivative means obtained by derivation, whereas unoriginal means lacking originality.

Derivative is also noun with the meaning: something derived.

check bellow for the other definitions of Derivative and Unoriginal

Derivative as an adjective:

Obtained by derivation; not radical, original, or fundamental.

Examples:

"a derivative conveyance; a derivative word"
Derivative as an adjective:

Imitative of the work of someone else.
Derivative as an adjective (legal, copyright):

Referring to a work, such as a translation or adaptation, based on another work that may be subject to copyright restrictions.
Derivative as an adjective (finance):

Having a value that depends on an underlying asset of variable value.
Derivative as an adjective:

Lacking originality.

Derivative as a noun:

Something derived.
Derivative as a noun (linguistics):

A word that derives from another one.
Derivative as a noun (finance):

A financial instrument whose value depends on the valuation of an underlying asset; such as a warrant, an option etc.
Derivative as a noun (chemistry):

A chemical derived from another.
Derivative as a noun (calculus):

The derived function of a function (the slope at a certain point on some curve f(x))

Examples:

"The derivative of <math>f:f(x) = x^2</math> is <math>f':f'(x) = 2x</math>"
Derivative as a noun (calculus):

The value of this function for a given value of its independent variable.

Examples:

"The derivative of <math>f(x) = x^2</math> at x = 3 is <math>f'(3) = 2 * 3 = 6</math>."

Unoriginal as an adjective:

Lacking originality.
Unoriginal as an adjective (rare):

Not being the first or earliest version of something, not original.
Unoriginal as an adjective (obsolete):

Without an origin or source.