extraneous

1 of 2

adjective

ex·​tra·​ne·​ous ek-ˈstrā-nē-əs 

1

: existing on or coming from the outside

extraneous light

2

a

: not forming an essential or vital part

extraneous ornamentation

b

: having no relevance

an extraneous digression

3

: being a number obtained in solving an equation that is not a solution of the equation

extraneous roots

extraneously adverb

extraneousness noun

extraneousness

2 of 2

noun

ex·​tra·​ne·​ous·​ness

plural -es

: the quality or state of being extraneous

Did you know?

Extraneous often refers to nonessential things, yet it comes from a Latin word concerned with something essential. That word, extrāneus, means “not belonging to one’s family or household.” (It’s also the origin of strange. Something “strange” is outside the family, i.e. unfamiliar.) The beginning of this Latin root is extrā, meaning “outside” or “beyond,” and we see these meanings in a number of common English words. Something extraordinary goes beyond what is normal, and extrajudicial refers to actions beyond those that a court has authorized. Similarly, an extraterrestrial comes from outside planet Earth, and extracurricular activities occur outside a school’s classes.

Synonyms of extraneous

Adjective

• irrelevant
• external
• extrinsic
• adventitious
• accidental

Choose the Right Synonym for extraneous

extrinsic, extraneous, foreign, alien mean external to a thing, its essential nature, or its original character.

extrinsic applies to what is distinctly outside the thing in question or is not contained in or derived from its essential nature.

sentimental value that is extrinsic to the house's market value

extraneous applies to what is on or comes from the outside and may or may not be capable of becoming an essential part.

arguments extraneous to the issue

foreign applies to what is so different as to be rejected or repelled or to be incapable of becoming assimilated.

techniques foreign to French cuisine

alien is stronger than foreign in suggesting opposition, repugnance, or irreconcilability.

a practice totally alien to her nature

Examples of extraneous in a Sentence

Adjective

Obviously, some degree of packaging is necessary to transport and protect the products we need, but all too often manufacturers add extraneous wrappers over wrappers and layers of unnecessary plastic. —Al Gore, An Inconvenient Truth, 2006

Industry sages argue that lump charcoal is poised for a back-to-the-future resurgence. They say that a new generation of consumers—aware that most briquettes are shot through with all manner of extraneous materials, from fillers of pulverized limestone to binders of sugarcane bagasse and ignition catalysts of sodium nitrate—are willing to pay the two-buck-a-bag premium for true lump, which, compared to traditional briquettes, lights quicker, burns hotter, and throws off no chemical residue. —John T. Edge, Gourmet, June 2003

The summer concert season is at hand, which means lots of warm nights wishing the guy in the row behind you would bogart that joint instead of blowing smoke into your hair, and lots of days spent wondering just how many extraneous … charges one ticket can possibly have added on. —Entertainment Weekly, 18 May 2001

She sped up the process by eliminating all extraneous steps.

the architect's streamlined modern style shuns any sort of extraneous ornamentation

Recent Examples on the Web

Adjective

Next, do away with geography and other extraneous details by redrawing your map as what’s known as a planar graph. — Gregory Barber, Quanta Magazine, 10 Sep. 2026

Howard said there was a large volume of character, reputation, and extraneous information related to the Metcalfs. — Cbs Texas Staff, CBS News, 20 Aug. 2026

Judges should consider voluntary surrender for low-risk individuals who have demonstrated compliance, ensuring punishment aligns with the court's order without adding extraneous suffering. — Walter Pavlo, Forbes.com, 18 Aug. 2026

But Sears, a starter who is now extraneous, is almost certainly the only one who will be sent down. — Kevin Acee, San Diego Union-Tribune, 4 Aug. 2026

Word History

Etymology

Adjective

Latin extrāneus "not belonging to one's family or household, coming from abroad, foreign, external" + -ous — more at strange entry 1

First Known Use

Adjective

1638, in the meaning defined at sense 1

Rhymes for extraneous

• spontaneous
• contemporaneous
• extemporaneous
• intracutaneous
• mucocutaneous
• lanius
• miscellaneous
• percutaneous
• simultaneous
• subcutaneous
• subterraneous
• transcutaneous

Kids Definition

extraneous

adjective

ex·​tra·​ne·​ous ek-ˈstrā-nē-əs 

1

: not forming a necessary part

2

: irrelevant

extraneously adverb

extraneousness noun