slim

American  

[slim] / slɪm /

adjective

slimmer, slimmest

1. slender, as in girth or form; slight in build or structure.

   Synonyms:

   thin

   Antonyms:

   fat

2. poor or inferior.

   a slim chance; a slim excuse.

3. small or inconsiderable; meager; scanty.

   a slim income.

   Synonyms:

   paltry, trivial, trifling, insignificant

   Antonyms:

   abundant, considerable

4. sized for the thinner than average person.

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verb (used with object)

slimmed, slimming

1. to make slim.

verb (used without object)

slimmed, slimming

1. to become slim.

2. Chiefly British. to try to become more slender, especially by dieting.

noun

1. a garment size meant for a thin person.

verb phrase

1. slim down

   1. to lose weight, especially intentionally.

   2. (of a business) to reduce operating expenses; economize.

slim ¹ British  

/ slɪm /

adjective

1. small in width relative to height or length

2. small in amount or quality

   slim chances of success

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verb

1. to make or become slim, esp by diets and exercise

2. to reduce or decrease or cause to be reduced or decreased

Slim ² British  

/ slɪm /

noun

1. the E African name for AIDS

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Slim ³ British  

/ slɪm /

noun

1. William Joseph , 1st Viscount. 1891–1970, British field marshal, who commanded (1943–45) the 14th Army in the reconquest of Burma (now called Myanmar) from the Japanese; governor general of Australia (1953–60)

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Related Words

See slender.

Other Word Forms

• slimly adverb
• slimmer noun
• slimness noun
• unslim adjective
• unslimly adverb
• unslimmed adjective
• unslimness noun

Etymology

Origin of slim

1650–60; < Dutch slim sly, (earlier) crooked (cognate with German schlimm bad, (earlier) crooked)

Explanation

Anything slim is thin or narrow. So, your sister may be considered slim, and you could also have "a slim chance" of winning the lottery. Slim people are slender, and slim things are usually delicate, like a slim watch band. You can also use slim to describe a margin or a chance: "There was only a slim likelihood that the home team would win this game." Back in the early 1800s, to slim meant "to do one's work carelessly," and in the seventeenth century, the adjective was also used to mean "sly or crafty."

Example Sentences

Her current majority is a slim 3.8%, and the result here will tell us a lot about the relative performances of the parties.

From BBC • Apr. 16, 2026

That is a considerable hit because the base models of these vehicles start at around $22,000 to $32,000 in the U.S. and margins tend to be slim.

From The Wall Street Journal • Apr. 16, 2026

The evidence presented by the Justice Department, though, was slim.

From Salon • Apr. 15, 2026

The ADU has a roomy kitchenette with white cabinets and countertops, a compact air fryer-toaster oven from Our Place, and a slim retro-style refrigerator from Unique.

From Los Angeles Times • Apr. 7, 2026

Four fingers of her slim brown hand grab four fingers of his surprisingly large pale hand.

From "Blended" by Sharon M. Draper