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