Main Entry:

²pump

Function:

verb

Date:

1508

intransitive verb

1: to work a pump : raise or move a fluid with a pump2: to exert oneself to pump or as if to pump something3: to move in a manner that resembles the action of a pump handletransitive verb1 a: to raise (as water) with a pump b: to draw fluid from with a pump2: to pour forth, deliver, or draw with or as if with a pump <pumped money into the economy> <pump new life into the classroom>3 a: to question persistently <pumped him for the information> b: to elicit by persistent questioning4 a: to operate by manipulating a lever b: to manipulate as if operating a pump handle <pumped my hand warmly> c: to cause to move with an action resembling that of a pump handle <a runner pumping her arms>5: to transport (as ions) against a concentration gradient by the expenditure of energy6 a: to excite (as atoms or molecules) especially so as to cause emission of coherent monochromatic electromagnetic radiation (as in a laser) b: to energize (as a laser) by pumping

— pump iron

: to lift weights