Mast or MAST may refer to:
Engineering
- Mast (sailing), a pole that holds a sail on sailing ships and boats, or antennas on modern warships
- Flagmast, on which a flag is flown
- Guyed mast, a type of tall structure supported by guy-wires
- Mooring mast, a structure designed to allow for the docking of an airship
- Radio masts and towers, poles or lattice towers that carry antennas/aerials
- The primary support for a helicopter rotor
- The main vertical structure of a forklift truck
- The electrical conduit attached to the side of a house or building that channels electricity to the customer's electricity meter
- Multi-axis shaker table, an automotive test system
- Model for Assessment of telemedicine - MAST - a model for assessment of telemedicine
Biology
- Mast (botany), the edible seed and fruit produced by trees or shrubs that wildlife species will consume
- Mast Arboretum, Stephen F. Austin State University, in Nacogdoches, Texas
- Mast cell, involved in the allergy response
- MAST, marine stramenopiles (also referred to as Heterokonts)
- Mast., in botanical naming, the standard author abbreviation for Maxwell T. Masters
- Two microtubule-associated serine/threonine-protein kinase enzymes:
Science
- Multi-Application Survivable Tether, an experimental space mission
- Multimission Archive at STScI, a component of the National Space Science Data Center
- Mega Ampere Spherical Tokamak, a nuclear fusion experiment in the UK
Society and culture
- Mast (hieroglyph), an Egyptian language triliteral
- Mast (naval), in naval tradition, a non-judicial punishment disciplinary hearing
- Mast (Sufism), in India, Pakistan, and Iran, a type of religious intoxication
- Mast (film), a 1999 Indian movie by Ram Gopal Verma
- Mast General Store, an American regional store chain
Places
- Mast-e Olya, a village in Markazi Province, Iran
- Mast-e Sofla, a village in Markazi Province, Iran
Organizations
- Maritime Archaeology Sea Trust, a UK-based maritime heritage charity
- Masters And slaves Together (MAsT), an international BDSM organization with local chapters
- Men Against Sexual Trafficking, an organisation opposing human trafficking
- Military anti-shock trousers, a medical device used to counteract severe blood loss
- Municipal Ambulance Services Trust, an EMS provider in Kansas City, Missouri
Schools
- Marine Academy of Science and Technology, a career academy located in Sandy Hook, New Jersey
- MAST Academy (Maritime and Science Technology Academy), a high school located on Virginia Key in Miami, Florida
- MAST Academy @ Homestead Medical Magnet, a medical high school located in Homestead, Florida
- José Martí MAST 6-12 Academy, a middle and high school located in Hialeah, Florida
People
- Austin Mast (born 1972), American botanist
- Dick Mast (born 1951), American professional golfer
- Peggy Mast (fl. 20th/21st century), American politician
- Rick Mast (born 1957), American NASCAR driver
Other
- Michigan Alcohol Screening Test, a test for alcoholism
- An honorific title for a young male under the age of 18, in which the title becomes Mr regardless of marriage status.