1 a: to make into a compact bundle b: to fill completely <fans packed the stadium>c: to fill with packing <pack a joint in a pipe>d: to load with a pack <pack a mule>e: to put in a protective container <goods packed for shipment> 2 a: to crowd together b: to increase the density of :compress 3 a: to cause or command to go without ceremony <packed him off to school>b: to bring to an end :give up —used with up or in<might pack up the assignment> —used especially in the phrase pack it in 4: to gather into tight formation : make a pack of (as hounds) 5: to cover or surround with a pack 6 a: to transport on foot or on the back of an animal <pack a canoe overland>b: to wear or carry as equipment <pack a gun>c: to be supplied or equipped with :possess<a storm packing hurricane winds>d: to make or be capable of making (an impact) <a book that packs a man-sized punch — C. J. Rolo>intransitive verb1 a: to go away without ceremony :depart<simply packed up and left>b:quit, stop —used with up or in<why don't you pack in, before you kill yourself — Millard Lampell> 2 a: to stow goods and equipment for transportation b: to be suitable for packing <a knit dress packs well> 3 a: to assemble in a group :congregateb: to crowd together 4: to become built up or compacted in a layer or mass <the ore packed into a stony mass> 5 a: to carry goods or equipment b: to travel with one's baggage (as by horse)