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Definitions

thinner

[thin-er] / ˈθɪn ər /

ADJECTIVE

fine, light, slender

Synonyms

STRONGEST

delicate fragile gaunt lean meager narrow skinny slim small

STRONG

attenuate attenuated emaciated peaked pinched pole rarefied shadow shriveled slight spare starved stick undernourished wan wasted

WEAK

beanpole beanstalk bony cadaverous ethereal featherweight gangling gangly haggard lank lanky lightweight puny rangy rawboned reedy rickety scraggy scrawny skeletal slinky spindly stalky stilt subtle threadlike twiggy twiglike underweight wizened

Antonyms

STRONGEST

big broad-minded fat generous heavy large liberal plump strong thick wide

STRONG

colorful flushed

WEAK

concentrated dense efficient inflated obese solid undiluted

ADJECTIVE

transparent, fine

Synonyms

STRONGEST

delicate flimsy paper-thin slim translucent wispy

STRONG

attenuate attenuated rarefied refined sheer slight

WEAK

diaphanous filmy gossamer permeable rare see-through subtile subtle tenuous unsubstantial wafer-thin

Antonyms

STRONGEST

heavy strong

STRONG

thick

WEAK

concentrated dense efficient fat inflated obese solid undiluted

ADJECTIVE

deficient, weak

Synonyms

STRONGEST

flat flimsy meager poor shallow skimpy sparse thick transparent

STRONG

diluted lame scant scattered slight stretched

WEAK

feeble implausible improbable inadequate inconceivable incredible insubstantial insufficient questionable scanty scarce sketchy superficial unbelievable unconvincing unpersuasive unsubstantial untenable vapid weak-kneed

Antonyms

STRONGEST

adequate full intelligent reasonable strong substantial sufficient

STRONG

concentrated

WEAK

dense efficient fat heavy inflated obese solid undiluted

ADJECTIVE

diluted

Synonyms

STRONGEST

watery weak

STRONG

diffuse dilute dispersed fine light rarefied refined

WEAK

runny subtle wishy-washy

Antonyms

STRONGEST

concentrated

STRONG

dark unrefined

WEAK

dense efficient fat heavy inflated obese solid strong thick undiluted

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

True, some worms can do that, too, but only spiders have spinnerets—specialized organs that produce silk—and the ability to weave threads that, though thinner than human hair, have greater tensile strength than steel.

From The Wall Street Journal • May 15, 2026

The NHS recommends the jabs for people who are overweight with obesity-related health risks, not people who just want to get a bit thinner.

From BBC • May 13, 2026

Pfizer’s biggest success continues to be its blood thinner, Eliquis, which is jointly manufactured and marketed with Bristol Myers Squibb.

From Barron's • May 5, 2026

A rally built on thinner activity can reverse quickly if investors lose their appetite for risk.

From MarketWatch • Apr. 29, 2026

He’s as sharply dressed as he was when he visited Wisconsin last year, although he’s thinner now.

From "Amina's Song" by Hena Khan