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Definitions

thin

[thin] / θɪn /
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
VERB
make diluted or less dense
Synonyms
STRONGEST
decrease diminish irrigate prune refine trim weaken
STRONG
attenuate cook cut delete disperse doctor edit emaciate expand extenuate lace needle rarefy reduce shave spike water
WEAK
cut back water down weed out
Antonyms
STRONGEST
develop enlarge grow increase
STRONG
strengthen
WEAK
beef up thicken

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.

He guides me inside a warehouse full of vast, bubbling water tanks and heaves out a haul of the squirming, long, thin black fish.

From BBC • Apr. 12, 2026

In the years since, I’ve kept one eye open in case any new “Cloverfield” properties drop out of thin air.

From Salon • Apr. 12, 2026

You catch up less, the messages thin out, and one day you realize you’re not really in each other’s lives anymore.

From Slate • Apr. 12, 2026

Scientists often had to slice brain tissue into extremely thin sections, image them with microscopes and piece together the pathways manually.

From Science Daily • Apr. 7, 2026

She was so thin I thought she might sink right into the mattress.

From "Rump: The (Fairly) True Story of Rumpelstilskin" by Liesl Shurtliff

Vocabulary lists containing thin

The SAT: Multiple-Meaning Words, List 4

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

The New SAT: Multiple-Meaning Words

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

The ACT Reading Test: Multiple-Meaning Words, List 4

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!