contravention

noun

1. (countable, uncountable)The act of contravening (a rule, regulation, law, or order) or of not fulfilling (an obligation, promise, or agreement).

   “Their contravention of the treaty increased international tensions.”

   “[…]and the Royal Navy's officers, sometimes in direct contravention of their orders, decided that they would board and capture any slaver they came across, regardless of whatever flag they flew[…]”