TLM

TLM full form may refer to:


 * Traditional Latin Mass, also known as Tridentine Mass


 * Taichung Literature Museum, a museum in Taichung, Taiwan
 * Télé Lyon Métropole, TV Channel of Lyon's agglomeration
 * Temporal light modulation
 * The Leprosy Mission
 * Thetis Lake Monster
 * Transaction-level modeling
 * Transmission-line matrix method
 * Transmission line measurement
 * Transmission line modelling
 * The ICAO airline code for Thai Lion Air
 * The Indian Railways station code for Tirusulam railway station, Chennai, Tamil Nadu, India
 * Teaching/Learning Materials, also known as Instructional materials
 * Tech Lead Manager, in technology companies, a "tech lead" (also known as a lead programmer) or team leader who also has some number of direct reports, as a more traditional manager would.