vulnerable

1 of 2

adjective

vul·​ner·​a·​ble ˈvəl-n(ə-)rə-bəl How to pronounce vulnerable (audio)
ˈvəl-nər-bəl
Synonyms of vulnerablenext
1
: capable of being easily hurt or harmed physically, mentally, or emotionally
The patient may be more vulnerable to infection immediately after surgery.
The lenses in children's eyes are clear and thus more vulnerable to light.—Anna Webb
2
: open to attack, harm, or damage : assailable
vulnerable to criticism
The fort was undefended and vulnerable.
Your computer may be vulnerable to viruses.
3
: liable to increased penalties but entitled to increased bonuses after winning a game in contract bridge

vulnerability

2 of 2

noun

vul·​ner·​a·​bil·​i·​ty ˌvəln(ə)rəˈbilətē How to pronounce vulnerability (audio)
-lətē, 
-i
: the quality or state of being vulnerable

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The History of Vulnerable

Superheroes are often depicted in comic books and movies as all-powerful, deflecting boulders and missiles in mid-air with a flick of the wrist, walking through walls, and having indestructible skeletons and whatnot. Fans know, however, that even the mightiest, meatiest protagonist is vulnerable to something, be it kryptonite or forgetting the whereabouts of one’s hammer. Vulnerable ultimately comes from the Latin noun vulnus, meaning “wound,” by way of the Late Latin adjective vulnerabilis, which English speakers adopted as vulnerable in the early 1600s. Vulnerable continues to carry its original meaning of “capable of being physically wounded,” but since the late 1600s it has also been used figuratively to suggest a defenselessness against non-physical attacks. In other words, someone (or something) can be vulnerable to criticism or failure as well as to literal wounding—even superheroes. So don’t go breaking their hearts, even if you can’t break their bones.

Examples of vulnerable in a Sentence

Adjective He was very vulnerable after his divorce. The troops were in a vulnerable position. The fort was undefended and vulnerable.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
Having patched the underlying bootloader vulnerability in 2022, Microsoft’s May 2023 patch batch included security updates to prevent attackers from loading older vulnerable boot managers. — Dan Goodin, ArsTechnica, 3 Nov. 2026 Senior citizens and disabled tenants say losing parking threatens their independence and may end up displacing the city’s most vulnerable residents. — Grace Toohey, Los Angeles Times, 3 Nov. 2026 The most vulnerable are children, people of color, people with disabilities, and the elderly. — Matt Jozwiak, New York Daily News, 3 Nov. 2026 Some players like to scout targets and organize combined attacks when enemy fleets are vulnerable. — Fran Ruiz, Space.com, 3 Nov. 2026 See All Example Sentences for vulnerable

Word History

Etymology

Adjective

Late Latin vulnerabilis, from Latin vulnerare to wound, from vulner-, vulnus wound; probably akin to Latin vellere to pluck, Greek oulē wound

First Known Use

Adjective

circa 1616, in the meaning defined at sense 1

Time Traveler
The first known use of vulnerable was circa 1616

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Cite this Entry

“Vulnerable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vulnerable. Accessed 4 Nov. 2026.

Kids Definition

vulnerable

adjective
vul·​ner·​a·​ble ˈvəln-(ə-)rə-bəl How to pronounce vulnerable (audio)
ˈvəl-nər-bəl
1
: capable of being physically or emotionally wounded
2
: open to attack or damage
a vulnerable position

Medical Definition

: capable of being hurt : susceptible to injury or disease
the liver is itself vulnerable to nutritional impairment—The Journal of the American Medical Association
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