an apparatus or machine for raising, driving, exhausting, or compressing fluids or gases by means of a piston, plunger, or set of rotating vanes.
Engineering, Building Trades. a shore having a jackscrew in its foot for adjusting the length or for bearing more firmly against the structure to be sustained.
Biology. an animal organ that propels fluid through the body; heart.
Cell Biology. a system that supplies energy for transport against a chemical gradient, as the for the transfer of sodium and potassium ions across a cell membrane.
verb (used with object)
to raise, drive, etc., with a pump.
to free from water or other liquid by means of a pump.
to inflate by (often followed by up):
to pump a tire up.
to operate or move by an up-and-down or back-and-forth action.
to supply with air, as an organ, by means of a pumplike device.
to drive, force, etc., as if from a pump:
He rapidly pumped a dozen shots into the bull’s-eye.
to supply or inject as if by using a pump:
to pump money into a failing business.
to question artfully or persistently to elicit information:
to pump someone for confidential information.
to elicit (information) by questioning.
verb (used without object)
to work a pump; raise or move water, oil, etc., with a pump.
to operate as a pump does.
to move up and down like a pump handle.
to exert oneself in a manner likened to :
He pumped away at his homework all evening.
to seek to elicit information from a person.
to come out in spurts.
prime the pump,
pump iron. (def 29).
a lightweight, low-cut shoe without fastenings for women.
a slip-on black patent leather shoe for men, for wear with formal dress.
any device for compressing, driving, raising, or reducing the pressure of a fluid, esp by means of a piston or set of rotating impellers
(biology) a mechanism for the active transport of ions, such as protons, calcium ions, and sodium ions, across cell membranes: a sodium pump
when tr, usually foll by from, out, into, away, etc. to raise or drive (air, liquid, etc, esp into or from something) with a pump or similar device
(transitive; usually foll by in or into) to supply in large amounts: to pump capital into a project
(transitive) to deliver (shots, bullets, etc) repeatedly with great force
to operate (something, esp a handle or lever) in the manner of a pump or (of something) to work in this way: to pump the pedals of a bicycle
(transitive) to obtain (information) from (a person) by persistent questioning
(intransitive; usually foll by from or out of) (of liquids) to flow freely in large spurts: oil pumped from the fissure
a low-cut low-heeled shoe without fastenings, worn esp for dancing
a type of shoe with a rubber sole, used in games such as tennis; plimsoll
“apparatus for forcing liquid or air,” early 15c., of uncertain origin, possibly from Middle Dutch pompe “water conduit, pipe,” or Middle Low German pumpe “pump” (Modern German Pumpe), both from some North Sea sailors’ word, possibly of imitative origin.
“low shoe without fasteners,” 1550s, of unknown origin, perhaps echoic of the sound made when walking in them, or perhaps from Dutch pampoesje, from Javanese pampoes, of Arabic origin. Klein’s sources propose a connection with pomp (n.). Related: pumps.
c.1500, from pump (n.1). Metaphoric extension in pump (someone) for information is from 1630s. To pump iron “lift weights for fitness” is from 1972. Related: Pumped; pumping.
v. pumped, pump·ing, pumps
[puhmp-ak-shuh n] /ˈpʌmpˌæk ʃən/ adjective 1. (of a shotgun or rifle) having an action that extracts the empty case, loads, and cocks the piece by means of a hand-operated lever that slides backward and forward; slide-action. adjective 1. (of a shotgun or other repeating firearm) operated by a slide-action mechanism feeding ammunition from a magazine […]
noun 1. the practice of buying shares, generating favourable publicity about them, especially on the internet, then selling them when the price accordingly rises modifier : Investigators reported two ”pump-and-dump” schemes in which Canadian companies were heavily hyped on computer bulletin board services. Their stock prices tripled or more in a short time, then collapsed […]
noun 1. a chamber of a pump in which a piston operates.
- Pumped and dumped
adjective phrase Exploited, then rejected; used and discarded: Poor Emmett is feeling ”pumped and dumped” (1990s+)