Keating barely bothered to greet him when they met, and then as an afterthought; Keating walked off in the middle of a sentence addressed to him; when Heyer issued some minor order to one of the draftsmen, it was not carried out and the draftsman informed him that the order had been countermanded by Mr. Keating.
There are no more uses of "countermand" in the book.
Show samples from other sources
She countermanded the order.
Mother had ordered me not to tell anyone about the curse, but Mandy could countermand the order so I’d be able to tell Char.