convection Meaning, Definition & Usage

  1. noun the transfer of heat through a fluid (liquid or gas) caused by molecular motion
  2. noun (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere

WordNet

Con*vec"tion noun
Etymology
L. convectio, fr. convehere to bring together; con- + vehere to carry.
Definitions
  1. The act or process of conveying or transmitting.
  2. (Physics) A process of transfer or transmission, as of heat or electricity, by means of currents in liquids or gases, resulting from changes of temperature and other causes.
    Liquids are generally heated by convection -- when heat is applied from bellow. Nichol.

Webster 1913