adj., -si·er, -si·est.

1. Light, thin, and insubstantial: a flimsy fabric.
2. Lacking solidity or strength: a flimsy table.
3. Lacking plausibility; unconvincing: a flimsy excuse.

n., pl. -sies.

1. Thin paper usually used to make multiple copies.
2. Something written on this thin paper.

[Origin unknown.]

flimsily flim'si·ly adv.
flimsiness flim'si·ness n.

adjective

1. Not physically strong: decrepit, delicate, feeble, fragile, frail, infirm, insubstantial, puny, unsound, unsubstantial, weak, weakly. See strong/weak.
2. Having little substance or significance; not solidly based: feeble, insubstantial, tenuous, unsubstantial. See strong/weak.
3. Not plausible or believable: implausible, improbable, inconceivable, incredible, shaky, thin, unbelievable, unconceivable, unconvincing, unsubstantial, weak. See likely/unlikely.

adj

Definition: not strong; light, thin
Antonyms: firm, heavy, solid, strong, sturdy, substantial, thick, tough

adj

Definition: unconvincing, implausible
Antonyms: convincing, persuasive, plausible, reasonable, serious, strong

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Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: a thin strong light-weight translucent paper used especially for making carbon copies
  Synonym: onionskin

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The adjective flimsy has 4 meanings:

Meaning #1: lacking solidity or strength
  Synonym: fragile

Meaning #2: having little substance or significance
  Synonyms: slight, tenuous, thin

Meaning #3: very thin and insubstantial
  Synonym: light

Meaning #4: resembling cardboard especially in flimsiness
  Synonym: cardboard

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Dansk (Danish)
adj. - spinkel, usolid
n. - gennemslagspapir, pengeseddel

Nederlands (Dutch)
zwak, onbenullig, ondeugdelijk, dun (doorzichtig), doorslag (vel), bankbiljet, dun kledingstuk

Français (French)
adj. - léger, peu solide, mince, piètre
n. - (GB) papier pelure

Deutsch (German)
adj. - dünn, fadenscheinig
n. - Durchschlagpapier, Durchschlag, (hauchdünne) Damenunterwäsche

Ελληνική (Greek)
adj. - λεπτός, μικρής αντοχής, (μτφ.) σαθρός, ψευτοκαμωμένος, αδύνατος, ασθενής
n. - τσιγαρόχαρτο

Italiano (Italian)
leggero, fragile, debole, inconsistente

Português (Portuguese)
adj. - frágil, superficial
n. - papel (m) fino, coisa (f) frágil

Русский (Russian)
тонкий, непрочный, неосновательный

Español (Spanish)
adj. - débil, endeble, frágil
n. - débil, endeble, frágil

Svenska (Swedish)
adj. - tunn, svag
n. - kopia, telegram

中文（简体） (Chinese (Simplified))
易坏的, 浅薄的, 脆弱的, 薄纸, 薄纸稿纸, 描图用薄纸

中文（繁體） (Chinese (Traditional))
adj. - 易壞的, 淺薄的, 脆弱的
n. - 薄紙, 薄紙稿紙, 描圖用薄紙

한국어 (Korean)
adj. - 얇은, 여린, 연약한
n. - 얇은 종이, 복사지, 전보

日本語 (Japanese)
adj. - 薄っぺらな, 脆い, 薄弱な, 見え透いた
n. - 薄葉紙, 通信原稿, 電報

العربيه (Arabic)
‏(صفه) رديء النوع (الاسم) ورق رقيق‏

עברית (Hebrew)
adj. - ‮חלש, שביר, דקיק, דק, קלוש‬
n. - ‮נייר דק, העתק‬

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