(abbreviation, alt-of, initialism, slang, uncountable) Initialism of ain't doin' right (the situation where an animal appears unwell but has not yet been diagnosed with any specific illness).
Anytime you notice your horse is ADR instead of BAR, it's time to get on the phone to your vet. 2018, Kendra Gale, The Big Book of Miniature Horses, Trafalgar Square Books, →ISBN:
(abbreviation, alt-of, countable, initialism, uncountable) Initialism of architectural decision record.
(qualifier:international law) The Agreement of 30 September 1957 concerning the International Carriage of Dangerous Goods by Road; formerly the European Agreement concerning the International Carriage of Dangerous Goods by Road.