rare1. [f. as prec. + -ITY.] Capricious irregularity or variability.

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1871.  Titusville (PA) Herald, 12 April, 3/4. All the accumulated wisdom … is quite inadequate to discover any means of placing the slightest curb upon these apparent vagarities of nature.

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1886.  N. & Q., 7th Ser. II. 89/1. Instances of vagarity are noticeable with each Prince of Wales, many of whom seem to have ignored … the title [of Duke of Cornwall].

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