Rush is defined as to suddenly move quickly or to hurry.(verb)
An example of to rush is for someone to run after another person who just left in order to catch up with them.
See rush in Webster's New World College Dictionary
Origin: ME ruschen < Anglo-Fr russher < MFr ruser, to repel, avert, orig., to mislead < OFr reuser: see ruse
Origin: ME rusche < OE risc, akin to MDu risch, Norw rusk < IE base *rezg-, to plait, twist > Sans rájju, L restis, cord
See rush in American Heritage Dictionary 4
verb rushed, rush·ing, rush·es verb, intransitive
Origin: Middle English rushen
Origin: , from Anglo-Norman russher
Origin: , variant of Old French ruser, to drive back
Origin: , from Latin recūsāre, to reject
Origin: : re-, re-
Origin: + causārī, to give as a reason (from causa, cause).
Origin: Middle English
Origin: , from Old English rysc.
Learn more about rush