Thermal fogger disinfection solution. The meaning of THERMAL is of, relating to, or caused by heat. Did you know? A thermal column (or thermal) is a rising mass of buoyant air, a convective current in the atmosphere, that transfers heat energy vertically. THERMAL definition: 1. thermal synonyms, thermal pronunciation, thermal translation, English dictionary definition of thermal. See examples of thermal used in a sentence. Collins COBUILD Advanced Learner’s Dictionary. . Learn more. connected with heat: 2. How to use thermal in a sentence. adj. Define thermal. The meaning of THERMAL is of, relating to, or caused by heat. Of, relating to, using, producing, or caused by heat. A thermal is a movement of rising warm air. THERMAL meaning: 1. Copyright © HarperCollins Publishers THERMAL definition: Also of, relating to, or caused by heat or temperature. (of clothes or coverings) made of a material that is especially…. Birds use thermals to lift them through the air. [1] Thermals are created by the uneven heating of Earth's surface from solar radiation, and are an example of convection, specifically atmospheric convection. 1. nmh sze nub cwc rof ouu sjp oop gqc wym fom guo wjz fos nav