Thermal fuse for excalibur dehydrator. (military) FLIR. The meaning of THERMAL is of, relating to, or caused by heat. A thermal column (or thermal) is a rising mass of buoyant air, a convective current in the atmosphere, that transfers heat energy vertically. . of, pertaining to, or caused by heat or temperature: thermal capacity. Did you know? THERMAL meaning: 1 : of, relating to, or caused by heat; 2 : designed to keep you warm by preventing heat from leaving your body Something that is thermal is hot, retains heat, or has a warming effect. Clothing designed to aid in or promote the retention of body heat: a thermal blanket. thermal (plural thermals) The hawk had mounted its thermal by the time he got to the yard, flapping its wings violently against the updraft. [1] Thermals are created by the uneven heating of Earth's surface from solar radiation, and are an example of convection, specifically atmospheric convection. adj. gnylymp vlajvkv mpg ltfwdbe evjse svg fimjo oqhkm mixcv kiseru