{{wiktionary|HRT}} '''HRT''' most commonly refers to: * Gender-affirming hormone therapy, also known as hormone replacement therapy **Masculinizing hormone therapy **Feminizing hormone therapy * Hormone replacement therapy, a treatment used to reduce symptoms associated with menopause * Hostage Rescue Team, the FBI's elite tactical unit
'''HRT''' may also refer to: {{TOC right}}
== Health and medicine == * Habit reversal training * Heart rate turbulence * Humane Research Trust, a British medical research charity
== Motor racing == * HRT Formula 1 Team, a defunct racing team * Haupt Racing Team, a German auto racing team * Walkinshaw TWG Racing, an Australian motor racing team that previously traded as the Holden Racing Team
== Transport == * Hampton Roads Transit, in the Norfolk-Virginia Beach, United States metro area * Hartwell Railroad, in Georgia, United States * Heavy rail transit, a term for types of passenger rail * Helsinki Regional Transport Authority (Swedish: ''{{lang|sv|Helsingfors Regionaltrafik}}'') * Hertfordshire Rail Tours, a defunct British railway company * Hiroshima Rapid Transit, in Japan * Honolulu Rail Transit, now known as the Skyline, a light metro in Hawaii * Hurlburt Field, a United States Air Force field in Florida, United States * RAF Linton-on-Ouse, a Royal Air Force station in England (IATA code: HRT)
== Other uses == * Hard real-time, in computing * Hértevin language, spoken in Turkey * Hertfordshire, county in England, Chapman code * High rising terminal, a feature of speech * Hrvatska radiotelevizija, Croatia's national broadcaster * Hudson River Trading, an American trading firm * Hydraulic retention time, in hydrology * Horse Race Tests, viral Twitter videos
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