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1. Characterized by, arising from, or subject to whimsy: a whimsical decision.
2. Playful or fanciful, especially in a humorous way: "The episodic book is memorable for its ... whimsical animal dialogue" (Peter D. Sieruta).
1. spontaneously fanciful or playful
2. given to whims; capricious
3. quaint, unusual, or fantastic. Also: whimmy
whim•si•cal(ˈʰwɪm zɪ kəl, ˈwɪm-)
1. given to fanciful notions; capricious.
2. of the nature of or proceeding from whimsy, as thoughts or actions: whimsical inventions.
3. erratic; unpredictable.
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|Adj.||1.||whimsical - determined by chance or impulse or whim rather than by necessity or reason; "a capricious refusal"; "authoritarian rulers are frequently capricious"; "the victim of whimsical persecutions"|
arbitrary - based on or subject to individual discretion or preference or sometimes impulse or caprice; "an arbitrary decision"; "the arbitrary rule of a dictator"; "an arbitrary penalty"; "of arbitrary size and shape"; "an arbitrary choice"; "arbitrary division of the group into halves"
2. Following no predictable pattern:
[person, idea, plot] → fantasque