Look up lsst in Wiktionary, the free dictionary.
LSST may refer to:
- Large Synoptic Survey Telescope, former name of the Vera C. Rubin Observatory astronomical observatory in Chile
- Legacy Survey of Space and Time, an astronomical survey performed at the Vera C. Rubin Observatory
- Lowstand systems tract, a type of sedimentary deposit in sequence stratigraphy
- The Priory Academy LSST, formerly Lincoln School of Science and Technology, a school in Lincolnshire, England, UK
- Legal Services Support Team, units of the United States Marine Corps Judge Advocate Division