Define arrogate: to claim or seize without justification; to make undue claims to having : assume — arrogate in a sentence Arrogate (foaled Ap) is an American Thoroughbred racehorse who won the 2016 Travers Stakes in a track record in his first stakes appearance. Arrogate horse page with past performances, results, pedigree, photos and videos. Arrogate horse rating and status. See who is a fan of Arrogate. Define arrogate. arrogate synonyms, arrogate pronunciation, arrogate translation, English dictionary definition of arrogate. tr.v. ar·ro·gat·ed , ar·ro·gat·ing. Arrogate definition, to claim unwarrantably or presumptuously; assume or appropriate to oneself without right: to arrogate the right to make decisions. See more. Arrogate and Bob Baffert at the barn the morning after his Classic win at Del Mar racetrack on N Del Mar Thoroughbred Club in Del Mar, CA. .183; Arrogate overcame a disastrous start to win Saturday's Dubai World Cup and confirm his status as thoroughbred racing's new superstar. Arrogate becomes the all-time money winner among North American horses with a $6-million victory in the Dubai World Cup on Saturday. Synonyms for arrogate at Thesaurus.com with free online thesaurus, antonyms, and definitions. Dictionary and Word of the Day. Arrogate finished third, beaten by less than a length, in his career debut in April 2016 at Los Alamitos. A bit immature in the spring, Arrogate turned in a dominant.