The difference between Boring and Dull

When used as adjectives, boring means causing boredom, whereas dull means lacking the ability to cut easily.

Boring is also noun with the meaning: a pit or hole which has been bored.

Dull is also verb with the meaning: to render dull.

check bellow for the other definitions of Boring and Dull

Boring as a noun:

A pit or hole which has been bored.
Boring as a noun:

Fragments thrown up when something is bored or drilled.
Boring as a noun:

Any organism that bores into a hard surface

Boring as an adjective:

Causing boredom; unable to engage or hold the interest.

Examples:

"What a boring film that was! I almost fell asleep."

Dull as an adjective:

Lacking the ability to cut easily; not sharp.

Examples:

"All these knives are dull."
Dull as an adjective:

Boring; not exciting or interesting.

Examples:

"He sat through the dull lecture and barely stayed awake."

"When does having a dull personality ever get you a girlfriend? Even if you get one, how does being dull help you keep a relationship for over a year?"
Dull as an adjective:

Not shiny; having a matte finish or no particular luster or brightness.

Examples:

"Choose a dull finish to hide fingerprints."

"a dull fire or lamp;&emsp; a dull red or yellow;&emsp; nowrap a dull mirror"
Dull as an adjective:

Not bright or intelligent; stupid; slow of understanding.
Dull as an adjective:

Sluggish, listless.
Dull as an adjective:

Cloudy, overcast.

Examples:

"It's a dull day."
Dull as an adjective:

Insensible; unfeeling.
Dull as an adjective:

Heavy; lifeless; inert.
Dull as an adjective (of pain etc):

Not intense; felt indistinctly or only slightly.

Examples:

"Pressing on the bruise produces a dull pain."
Dull as an adjective:

Not clear, muffled.

Dull as a verb (transitive):

To render dull; to remove or blunt an edge or something that was sharp.

Examples:

"Years of misuse have dulled the tools."
Dull as a verb (transitive):

To soften, moderate or blunt; to make dull, stupid, or sluggish; to stupefy.

Examples:

"He drinks to dull the pain."
Dull as a verb (intransitive):

To lose a sharp edge; to become dull.

Examples:

"A razor will dull with use."
Dull as a verb:

To render dim or obscure; to sully; to tarnish.