\ˈstreŋ(k)th, ˈstren(t)th \
plural strengths\ˈstreŋ(k)ths, ˈstren(t)ths, ˈstreŋks \

Definition of strength 

1 : the quality or state of being strong : capacity for exertion or endurance

2 : power to resist force : solidity, toughness

3 : power of resisting attack : impregnability

4a : legal, logical, or moral force

b : a strong attribute or inherent asset the strengths and the weaknesses of the book are evident

5a : degree of potency of effect or of concentration chili peppers in varying strengths

b : intensity of light, color, sound, or odor

c : vigor of expression

6 : force as measured in numbers : effective numbers of any body or organization an army at full strength

7 : one regarded as embodying or affording force or firmness : support you are my love and my strength

8 : maintenance of or a rising tendency in a price level : firmness of prices the strength of the dollar

9 : basis used in the phrase on the strength of

from strength to strength

: vigorously forward : from one high point to the next

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Choose the Right Synonym for strength

power, force, energy, strength, might mean the ability to exert effort. power may imply latent or exerted physical, mental, or spiritual ability to act or be acted upon. the awesome power of flowing water force implies the actual effective exercise of power. used enough force to push the door open energy applies to power expended or capable of being transformed into work. a worker with boundless energy strength applies to the quality or property of a person or thing that makes possible the exertion of force or the withstanding of strain, pressure, or attack. use weight training to build your strength might implies great or overwhelming power or strength. the belief that might makes right

Examples of strength in a Sentence

I was impressed by his strength. She's doing exercises to build up the strength in her legs. Don't work too hard. You need to conserve your strength for tomorrow. Pull-ups increase upper body strength. Working on a farm requires a lot of physical strength. the strength and durability of the material I pray that I'll have the strength to do what I have to do. His determination shows real strength of character. Her inner strength is an inspiration to us all.
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Recent Examples on the Web

But prosecutors have said Vance’s ruling was erroneous and would set bad legal precedents regarding the strength of evidence needed to overcome time limits on appeals. Kevin Mcgill, The Seattle Times, "Free after 36 years, he won’t face prosecution in 1980 death," 20 Nov. 2018 Investigators caught a glimpse of the spacecraft's own magnetic field during the deployment; the strength of the field dropped off as the boom extended away from the spacecraft. Elizabeth Howell,, "Here Comes the Sun! Parker Solar Probe Instruments See 'First Light'," 25 Sep. 2018 Wong’s lab has developed a smart CAR-T called the Split Universal and Programmable (SUPRA) CAR system, which homes in on multiple cancer biomarkers and adjusts the strength of the immune response to the patient’s degree of cancer. Eric Smalley, Discover Magazine, "Cellular Cyborgs: How Programmable DNA Strands Might Control Healing," 25 Sep. 2018 Both of these anti-password moves come in the wake of Google's new Titan security keys, which aim to increase the strength of the password though not to outright replace it—yet. Eric Limer, Popular Mechanics, "Is This Finally the Beginning of the End for the Password?," 24 Sep. 2018 But for the smaller nations of Eastern Europe, the relative strength of the world’s most powerful military alliance, and the relative weakness of Russia, looks pretty obvious. Simon Shuster/tallinn, Time, "Trump Shakes Up NATO, but Eastern European Allies Aren't Stirred," 13 July 2018 But other reports have noted the strength of a Kethledge nominee for his support of the Second Amendment, as well as what analyst see as a relatively easy confirmation, compared to some other potential nominees. Paul Egan, Detroit Free Press, "Is President Trump losing interest in Michigan judge for Supreme Court pick?," 9 July 2018 The show’s central theme of strength through sisterhood is something that Sarah can relate to as one of four sisters in her family. Chelsea Greenwood Lassman, Teen Vogue, ""Charmed" Star Sarah Jeffery on the Resurgence of Witches and Why She'd Use Her Powers on Her Dog," 12 Nov. 2018 There may be opportunities for bipartisan cooperation on clean energy at the state level (here’s an example from 2016), but those typically come when economic incentives align and Democrats are operating from a position of strength. David Roberts, Vox, "After the midterms, US climate politics are even more polarized. Here’s how Dems can move forward.," 12 Nov. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'strength.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of strength

before the 12th century, in the meaning defined at sense 1

History and Etymology for strength

Middle English strengthe, from Old English strengthu; akin to Old High German strengi strong — more at strong

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Statistics for strength

Last Updated

7 Dec 2018

Look-up Popularity

Time Traveler for strength

The first known use of strength was before the 12th century

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More Definitions for strength



English Language Learners Definition of strength

: the quality or state of being physically strong

: the ability to resist being moved or broken by a force

: the quality that allows someone to deal with problems in a determined and effective way


\ˈstreŋth \

Kids Definition of strength

1 : the quality or state of being physically strong He pushed the rock with all his strength.

2 : power to resist force the strength of a rope

3 : ability to produce an effect maximum strength cough syrup

4 : degree of intensity … the full strength of the thunderstorm erupted.— Susan Cooper, The Dark is Rising

5 : power as measured in numbers The army is at full strength.

6 : a strong or positive quality What do you think are your strengths and weaknesses?

7 : the inner courage or determination that allows a person to face and deal with difficulties


\ˈstreŋ(k)th, ˈstren(t)th \
plural strengths\ˈstreŋ(k)ths, ˈstren(t)ths, ˈstreŋks \

Medical Definition of strength 

1 : the quality or state of being strong : capacity for exertion or endurance

2 : degree of potency of effect or of concentration

3 : degree of ionization of a solution used of acids and bases

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More from Merriam-Webster on strength

Thesaurus: All synonyms and antonyms for strength

Spanish Central: Translation of strength

Nglish: Translation of strength for Spanish Speakers

Britannica English: Translation of strength for Arabic Speakers

Comments on strength

What made you want to look up strength? Please tell us where you read or heard it (including the quote, if possible).


the figure or shape of a crescent moon

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