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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.

It is paired with a matching yellow mini duffel handbag and a thin lycra and power mesh sports bra.

From Los Angeles Times • May 11, 2026

As the channels deepen and widen, parts of the ice shelf may thin unevenly, reducing the shelf's overall structural stability.

From Science Daily • May 10, 2026

The oblong ugly vegetable with lizard-like ridges is dark green, holding secrets, grows on thin vines.

From Salon • May 9, 2026

"She was very thin and we had to hand-feed her at first - she has a real appetite but we have to feed her up slowly," Charlotte said.

From BBC • May 8, 2026

I transferred the Bible in its bag from Betsie’s back to my own; she was so thin it made a visible bump between her shoulders.

From "The Hiding Place" by Corrie ten Boom

Vocabulary lists containing thin

The SAT: Multiple-Meaning Words, List 4

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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!