HAST Views 14 meanings found HAST can be an informal farewell meaning “Have a safe trip,” the name of an academic science academy, the abbreviation for local swim teams, and it occasionally appears in health discussions related to HIV/AIDS. Medical High Altitude Simulation Test HIV, AIDS, STIs and TB Miscellaneous HIV and AIDS sexually transmitted Highly Accelerated Stress Test Hyper Amorphous Silicon TFT Governmental High-Altitude Supersonic Target Humanitarian Assistance Survey Team Academic & Science Highly-Accelerated Stress Testing Hammond Academy of Science and Technology Regional Hawaii-Aleutian Standard Time Computing Have A Safe Trip! Business Hastings Entertainment, Inc. Sports Hilton Area Swim Team Hilltop Aquatic Swim Team