slim

UK: 'slim', 'Slim': /slɪm/ US: /slɪm/ ,(slim)

Inflections of 'slim' (v): (⇒ conjugate)

slims

v 3rd person singular

slimming

v pres p

slimmed

v past

slimmed

v past p

WordReference Random House Learner's Dictionary of American English © 2025

slim /slɪm/   adj., slim•mer, slim•mest, v., slimmed, slim•ming. 
adj. 

1. slender, as in the width around one's body or in form:
   a slim figure.
2. poor or inferior;
   meager:
   a slim chance.

v. 

3. Often, slim down. to (cause to) become slim: [no object]
   He's been on a diet and has slimmed down.
   [~ + object + down]
   Diet and exercise will slim you down.
   [~ + down + object]
   to slim down even the most overweight dieters.

slim•ness, n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2025

slim  (slim), adj., slim•mer, slim•mest, v., slimmed, slim•ming, n. 
adj. 

1. slender, as in girth or form;
   slight in build or structure.
2. poor or inferior:
   a slim chance; a slim excuse.
3. small or inconsiderable;
   meager;
   scanty:
   a slim income.
4. Clothing sized for the thinner than average person.

v.t. 

5. to make slim.

v.i. 

6. to become slim.
7. British Terms [Chiefly Brit.] to try to become more slender, esp. by dieting.
8. slim down:
   • to lose weight, esp. intentionally.
   • (of a business) to reduce operating expenses;
     economize.

n. 

9. Clothing a garment size meant for a thin person.

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

slim′ly, adv. 
slim′ness, n. 
Synonyms

• 1. thin. See slender. 
• 3. insignificant, trifling, trivial, paltry.

Antonyms

• 1. fat.
• 3. considerable; abundant.

Collins Concise English Dictionary © HarperCollins Publishers::

slim / slɪm/ adjective (slimmer, slimmest)

1. small in width relative to height or length
2. small in amount or quality: slim chances of success

verb (slims, slimming, slimmed)

1. to make or become slim, esp by diets and exercise
2. to reduce or decrease or cause to be reduced or decreased

Etymology: 17th Century: from Dutch: crafty, from Middle Dutch slimp slanting; compare Old High German slimbi obliquity

ˈslimmer noun

ˈslimness noun

Collins Concise English Dictionary © HarperCollins Publishers::

Slim / slɪm/ noun

1. the E African name for AIDS

Etymology: from its wasting effects

Slim / 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 Myanmar) from the Japanese; governor general of Australia (1953–60)