(noun, adjective, verb, adverb)


1. of relatively small extent from one surface to the opposite or in cross section

- thin wire

- a thin chiffon blouse

- a thin book

Similar word(s): lean, thin, bladed, capillary, hairlike, compressed, flat, depressed, cobwebby, diaphanous, filmy, gauzy, gossamer, sheer, transparent, vaporous, vapourous, filamentlike, filamentous, filiform, threadlike, thready, fine, light, hyperfine, papery, ribbonlike, ribbony, sleazy, slender, tenuous, narrow

2. lacking excess flesh

- you can't be too rich or too thin

Similar word(s): ectomorphic, anorectic, anorexic, cadaverous, emaciated, gaunt, haggard, pinched, skeletal, wasted, lank, spindly, rawboned, reedlike, reedy, twiggy, twiglike, scarecrowish, boney, bony, scraggly, scraggy, scrawny, skinny, underweight, weedy, shriveled, shrivelled, shrunken, withered, wizen, wizened, slender, slight, slim, svelte, spare, trim, stringy, wiry, sylphic, sylphlike, wisplike, wispy, thin, lean

3. very narrow

- a thin line across the page

Similar word(s): narrow, slender

4. not dense

- a thin beard

Similar word(s): distributed, sparse

5. relatively thin in consistency or low in density; not viscous

- air is thin at high altitudes

- a thin soup

- skimmed milk is much thinner than whole milk

Similar word(s): tenuous, rare, rarefied, rarified

6. (of sound) lacking resonance or volume

- a thin feeble cry

Similar word(s): pale

7. lacking spirit or sincere effort

- a thin smile

Similar word(s): spiritless

8. lacking substance or significance

- a thin plot

Similar word(s): insignificant, unimportant, flimsy, fragile, slight, tenuous

Sentences with thin as an adjective:

- thin plate of metal

- thin paper

- thin board

- thin covering

- thin string

- thin person

- The trees of a forest are thin; the corn or grass is thin.

- a thin disguise


1. without viscosity

- the blood was flowing thin

Similar word(s): thinly

Sentences with thin as an adverb:

- seed sown thin


1. (philately) A loss or tearing of paper from the back of a stamp, although not sufficient to create a complete hole.

2. Any food produced or served in thin slices.

- chocolate mint thins

- potato thins


1. lose thickness; become thin or thinner

Definition categories: change, turn

2. make thin or thinner

- Thin the solution

Definition categories: change, cut, reduce, trim

3. lessen the strength or flavor of a solution or mixture

Similar word(s): cut, dilute, reduce

Definition categories: change, weaken

4. take off weight

Similar word(s): reduce, slenderize, slim

Definition categories: body, turn