a person or thing that accumulates.
a register or electric device on an arithmetic machine, as an adding machine, cash register, or digital computer, that receives a number and produces and stores the results of arithmetic operations of the given number with other numbers.
British. a storage battery or storage cell.
an apparatus that stores fluid at approximately the working pressure of the hydraulic or pneumatic system in which it will be employed, so that a supply of fluid is always immediately available to the system.
Machinery. (in a boiler) a vessel for storing hot fluid, ready to flash into steam.
Hydraulics. a vessel in which air is trapped and compressed by the liquid, thus storing energy to supply liquid under pressure when the demand of the system is greater than the capacity of the pump.

Origin of accumulator

1685–95; < Latin accumulātor, equivalent to accumulā(re) to heap up (see accumulate) + -tor -tor Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for accumulator

Historical Examples of accumulator

  • He unsnapped his accumulator and crossed to the power generator.

    The Players

    Everett B. Cole

  • He simply drained his accumulator stacks and threw it all into our face.


    Clifford Donald Simak

  • An accumulator must be "formed" before it can do its normal amount of work.

    Natural Philosophy

    Wilhelm Ostwald

  • He was not merely an accumulator of knowledge as it had been prepared by some one else.

    Dickens As an Educator

    James L. (James Laughlin) Hughes

  • For this reason the storage battery was called an "accumulator."

    The Story of Great Inventions

    Elmer Ellsworth Burns

British Dictionary definitions for accumulator



Also called: battery, storage battery a rechargeable device for storing electrical energy in the form of chemical energy, consisting of one or more separate secondary cells
horse racing, British a collective bet, esp on four or more races, in which the stake and winnings on each successive race are carried forward to become the stake on the next, so that both stakes and winnings accumulate progressively so long as the bet continues to be a winning one
  1. a register in a computer or calculator used for holding the results of a computation or data transfer
  2. a location in a computer store in which arithmetical results are produced
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012