The definition of a pack is a container for something to be carried or stored.(noun)
An example of pack is a bag in which you'd put all your essentials for a long distance hiking trip.
Pack is defined as to put things together for storage or for moving from one place to another.(verb)
See pack in Webster's New World College Dictionary
Origin: ME pakke < MDu pak < MFl pac: term carried throughout Europe via the Low Countries' wool trade (as in Fr pacque, It pacco, Ir pac, ML paccus)
Origin: ME pakken
Origin: < ? pact, but infl. by pack
Origin: prob. altered < pact, ult. < L pactus: see pact
See pack in American Heritage Dictionary 4
Origin: Middle English pak
Origin: , possibly of Low German origin.
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