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buffer bar


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WordReference Random House Learner's Dictionary of American English © 2026
buff•er1 /ˈbʌfɚ/USA pronunciation   n. 
    [countable]
  1. Rail Transportan apparatus at the end of a railroad car, etc., for absorbing shock during coupling, etc.
  2. one that shields and protects against harm, or lessens the impact of a shock or other misfortune:That small country was created as a buffer against the two warring states around it.
  3. Computinga temporary storage area that holds data until a computer is ready to process it.

v. [~ + object]
  1. to cushion, shield, or protect.

buff•er2 /ˈbʌfɚ/USA pronunciation   n. [countable]
  1. Metallurgya device for polishing or buffing.

buff•er3 /ˈbʌfɚ/USA pronunciation   n. [countable] Brit. Slang.
  1. British Termsa foolish person.

WordReference Random House Unabridged Dictionary of American English © 2026
buff•er1  (buf′ər),USA pronunciation n. 
  1. an apparatus at the end of a railroad car, railroad track, etc., for absorbing shock during coupling, collisions, etc.
  2. Mechanical Engineeringany device, material, or apparatus used as a shield, cushion, or bumper, esp. on machinery.
  3. any intermediate or intervening shield or device reducing the danger of interaction between two machines, chemicals, electronic components, etc.
  4. a person or thing that shields and protects against annoyance, harm, hostile forces, etc., or that lessens the impact of a shock or reversal.
  5. any reserve moneys, negotiable securities, legal procedures, etc., that protect a person, organization, or country against financial ruin.
  6. GovernmentSee buffer state. 
  7. Ecologyan animal population that becomes the prey of a predator that usually feeds on a different species.
  8. Computinga storage device for temporarily holding data until the computer is ready to receive or process the data, as when a receiving unit has an operating speed lower than that of the unit feeding data to it.
  9. Electronicsa circuit with a single output activated by one or more of several inputs.
  10. Chemistry
    • any substance or mixture of compounds that, added to a solution, is capable of neutralizing both acids and bases without appreciably changing the original acidity or alkalinity of the solution.
    • Also called buff′er solu′tion. a solution containing such a substance.

v.t. 
  1. Chemistryto treat with a buffer.
  2. to cushion, shield, or protect.
  3. to lessen the adverse effect of;
    ease:The drug buffered his pain.
  • buff2 + -er1 1825–35

buff•er2  (buf′ər),USA pronunciation n. 
  1. Metallurgya device for polishing or buffing, as a buff stick or buff wheel.
  2. Metallurgya worker who uses such a device.
  • buff1 + -er1 1850–55

buff•er3  (buf′ər),USA pronunciation n. [Brit. Slang.]
  1. British Termsa foolish or incompetent person.
  2. British Termsa fellow;
    man.
  3. British Termsa chief boatswain's mate in the British navy.
  • origin, originally uncertain 1680–90

Collins Concise English Dictionary © HarperCollins Publishers::
buffer / ˈbʌfə/
  1. one of a pair of spring-loaded steel pads attached at both ends of railway vehicles and at the end of a railway track to reduce shock due to contact
  2. a person or thing that lessens shock or protects from damaging impact, circumstances, etc
  3. an ionic compound, usually a salt of a weak acid or base, added to a solution to resist changes in its acidity or alkalinity and thus stabilize its pH
  4. Also called: buffer solution a solution containing such a compound
  5. a memory device for temporarily storing data immediately prior to its transfer or use
  6. short for buffer state
 (transitive)
  1. to insulate against or protect from shock; cushion
  2. to add a buffer to (a solution)
  3. to store (data) in a buffer prior to its transfer or use
Etymology: 19th Century: from buff2
buffer / ˈbʌfə/
  1. any device used to shine, polish, etc; buff
  2. a person who uses such a device
buffer / ˈbʌfə/
  1. a stupid or bumbling man (esp in the phrase old buffer)
Etymology: 18th Century: perhaps from Middle English buffer stammerer

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