• The ejection of water, or water and solid materials, such as clay or silt, along transverse or longitudinal joints and cracks, and along pavement edges. Pumping is caused by downward slab movement activated by the passage of loads over the pavement after the accumulation of free water on or in the base course, subgrade, or subbase. See also of pavements.


  • In a laser, the excitation of electrons, molecules, or ions to higher energy levels, so as to initiate and sustain lasing action. common methods utilized are the application of light, an electrical discharge, or through the effect of a chemical reaction. Also called laser pumping.
  • Pumping (1) in another device, such a maser or parametric amplifier.


  • noun the transfer of food by mechanised means from one part of the production line to the next