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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.

For XPANCEO, this could make it possible to perform the sophisticated light control needed for AR displays using materials that are thousands of times thinner than a human hair.

From Science Daily • Jun. 1, 2026

The massive run-up also has raised the specter of a summertime pullback, given thinner trading volumes and a lack of corporate headlines expected over June and July.

From Barron's • May 29, 2026

That is a thin harvest—and thinner still since Yeats was Irish.

From The Wall Street Journal • May 29, 2026

Exhaustion was setting in, but the deodorant I’d packed needed to be replaced, so I found myself roaming the body care aisles, wincing under the fluorescent lights as my patience rapidly grew thinner.

From Salon • May 22, 2026

Now she could see that he was younger than she’d thought, perhaps only in his thirties, and thinner, too.

From "Little Fires Everywhere" by Celeste Ng