pump1top: jet pumpbottom: centrifugal pumppump 1 (p?mp)n.1. A machine or device for raising, compressing, or transferring fluids.2. Physiology A molecular mechanism for the active transport of ions or molecules across a cell membrane.3. Physics Electromagnetic radiation used to raise atoms or molecules to a higher energy level.4. Informal The heart.5. Informal The place where consumers purchase gasoline. Used with the: gas prices rising at the pump.v. pumped, pump·ing, pumps v.tr.1. To cause to flow by means of a pump or pumplike organ or device: Derricks pumped oil out of the ground. The heart pumps blood throughout the body.2. To draw, deliver, or pour forth: a writer who pumped out a new novel every year.3. To propel, eject, or insert: pumped new life into the economy.4. To cause to move with an up-and-down or back-and-forth motion: a bicyclist pumping the pedals; a piston pumping a shaft.5. To push or pull (a brake or lever, for instance) rapidly: a driver pumping the brakes.6. To shoot (bullets, for example) at or into: a gunner pumping rounds at a target.7. Physics To raise (atoms or molecules) to a higher energy level by exposing them to electromagnetic radiation at a resonant frequency.8. Physiology To transport (ions or molecules) against a concentration gradient by the expenditure of chemically stored energy.9. To invest (money) repeatedly or persistently in something.10. To question closely or persistently: pump a witness for secret information.11. Informal To promote or publicize vigorously: The company pumped its new product on its website.v.intr.1. To operate a pump.2. To move gas or liquid with a pump or a pumplike organ or device.3. To move up and down or back and forth in a vigorous manner: My legs were pumping as I ran up the stairs.4. To flow in spurts: Blood was pumping from the wound.5. Sports To fake a throw, pass, or shot by moving the arm or arms without releasing the ball.Phrasal Verb: pump up1. To inflate with gas by means of a pump: pump up a tire.2. Slang To fill with enthusiasm, strength, or energy: The lively debate really pumped us up.3. Sports To be actively involved in a bodybuilding program: athletes pumping up at the gym.Idiom: pump iron Sports To lift weights.[Middle English pumpe.]pump?er n.pump 2 (p?mp)n. A shoe that has a closed back and is cut low around the toes, usually with heels and no fastenings.[Origin unknown.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.pump (p?mp) n1. (Mechanical Engineering) any device for compressing, driving, raising, or reducing the pressure of a fluid, esp by means of a piston or set of rotating impellers2. (Biology) biology a mechanism for the active transport of ions, such as protons, calcium ions, and sodium ions, across cell membranes: a sodium pump. vb3. (General Engineering) (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 device4. (tr; usually foll by in or into) to supply in large amounts: to pump capital into a project. 5. (Firearms, Gunnery, Ordnance & Artillery) (tr) to deliver (shots, bullets, etc) repeatedly with great force6. (General Engineering) 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. 7. (tr) to obtain (information) from (a person) by persistent questioning8. (intr; usually foll by from or out of) (of liquids) to flow freely in large spurts: oil pumped from the fissure. [C15: from Middle Dutch pumpe pipe, probably from Spanish bomba, of imitative origin]pump (p?mp) n1. (Clothing & Fashion) a low-cut low-heeled shoe without fastenings, worn esp for dancing2. (Clothing & Fashion) a type of shoe with a rubber sole, used in games such as tennis; plimsoll[C16: of unknown origin]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014pump1 (p?mp) n. 1. an apparatus or machine for raising, driving, exhausting, or compressing fluids or gases by means of a piston, plunger, or set of rotating vanes. 2. Informal. the heart. 3. a biological system that supplies energy for the transport of molecular substances against a chemical gradient, as sodium and potassium ions across the cell membrane. v.t. 4. to raise or drive with a pump. 5. to force or inject like a pump or as if by using a pump: The gangster pumped ten bullets into him. 6. to free from water or other liquid by means of a pump. 7. to operate or move by an up-and-down or back-and-forth action. 8. to question (someone) artfully or persistently so as to elicit information. 9. to elicit (information) by questioning. v.i. 10. to work a pump. 11. to operate as a pump does. 12. to move up and down like a pump handle. 13. to come out in spurts. 14. pump up, a. to inflate by pumping: to pump up a tire. b. to infuse with enthusiasm, competitive spirit, etc. Idioms: pump iron, to lift weights as an exercise or in competition. [1400?50; late Middle English pumpe (n.)] pump2 (p?mp) n. 1. a lightweight, low-cut shoe without fastenings for women. 2. a slip-on black patent leather man’s shoe for wear with formal dress. [1720?30; orig. uncertain] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.pump (p?mp) A machine for raising or transferring fluids. Most pumps function either by compression or suction.The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.pumpPast participle: pumpedGerund: pumpingImperativePresentPreteritePresent ContinuousPresent PerfectPast ContinuousPast PerfectFutureFuture PerfectFuture ContinuousPresent Perfect ContinuousFuture Perfect ContinuousPast Perfect ContinuousConditionalPast ConditionalImperativepumppumpPresentI pumpyou pumphe/she/it pumpswe pumpyou pumpthey pumpPreteriteI pumpedyou pumpedhe/she/it pumpedwe pumpedyou pumpedthey pumpedPresent ContinuousI am pumpingyou are pumpinghe/she/it is pumpingwe are pumpingyou are pumpingthey are pumpingPresent PerfectI have pumpedyou have pumpedhe/she/it has pumpedwe have pumpedyou have pumpedthey have pumpedPast ContinuousI was pumpingyou were pumpinghe/she/it was pumpingwe were pumpingyou were pumpingthey were pumpingPast PerfectI had pumpedyou had pumpedhe/she/it had pumpedwe had pumpedyou had pumpedthey had pumpedFutureI will pumpyou will pumphe/she/it will pumpwe will pumpyou will pumpthey will pumpFuture PerfectI will have pumpedyou will have pumpedhe/she/it will have pumpedwe will have pumpedyou will have pumpedthey will have pumpedFuture ContinuousI will be pumpingyou will be pumpinghe/she/it will be pumpingwe will be pumpingyou will be pumpingthey will be pumpingPresent Perfect ContinuousI have been pumpingyou have been pumpinghe/she/it has been pumpingwe have been pumpingyou have been pumpingthey have been pumpingFuture Perfect ContinuousI will have been pumpingyou will have been pumpinghe/she/it will have been pumpingwe will have been pumpingyou will have been pumpingthey will have been pumpingPast Perfect ContinuousI had been pumpingyou had been pumpinghe/she/it had been pumpingwe had been pumpingyou had been pumpingthey had been pumpingConditionalI would pumpyou would pumphe/she/it would pumpwe would pumpyou would pumpthey would pumpPast ConditionalI would have pumpedyou would have pumpedhe/she/it would have pumpedwe would have pumpedyou would have pumpedthey would have pumpedCollins English Verb Tables © HarperCollins Publishers 2011