The difference between Dullness and Luster

When used as nouns, dullness means the quality of being slow of understanding things, whereas luster means shine, polish or sparkle.

Luster is also verb with the meaning: to gleam, have luster.

check bellow for the other definitions of Dullness and Luster

Dullness as a noun:

The quality of being slow of understanding things; stupidity.
Dullness as a noun:

The quality of being uninteresting; boring or irksome.
Dullness as a noun:

Lack of interest or excitement.
Dullness as a noun:

The lack of visual brilliance; want of sheen.
Dullness as a noun (of an edge):

bluntness.
Dullness as a noun:

The quality of not perceiving or kenning things distinctly.
Dullness as a noun (archaic):

Drowsiness.

Luster as a noun:

Shine, polish or sparkle.

Examples:

"He polished the brass doorknob to a high luster."
Luster as a noun:

By extension, brilliance, attractiveness or splendor.

Examples:

"After so many years in the same field, the job had lost its luster."
Luster as a noun:

Refinement, polish or quality.

Examples:

"He spoke with all the lustre a seasoned enthusiast should have."
Luster as a noun:

A candlestick, chandelier, girandole, etc. generally of an ornamental character.
Luster as a noun:

A substance that imparts lustre to a surface, such as plumbago or a glaze.
Luster as a noun:

Lusterware.
Luster as a noun:

A fabric of wool and cotton with a lustrous surface, used for women's dresses.

Luster as a verb (intransitive):

To gleam, have luster.
Luster as a verb (transitive):

To give luster, distinguish.
Luster as a verb (transitive):

To give a coating or other treatment to impart physical luster.

Luster as a noun:

A lustrum, quinquennium, a period of five years, originally the interval between Roman censuses.