Pump action is a mechanism where the fore-end of the rifle or the shotgun, which is the handle of the firearm that is typically below the barrel at the front of the firearm, is moved backward and forward by the operator of the rifle or shotgun. Typically the backward stroke is used to unload the firearm or eject a fired cartridge and the forward stroke is used to load a fresh cartridge to fire again. It also falls into the category of a manually operated mechanism.
On December 8th, 2022. See this statement in context.