1(British English) a small paper or cardboard container in which goods are packed for sellinga packet of biscuits/cigarettes/crisps compare packnoun (1), package see also pay packet2a small object wrapped in paper or put into a thick envelope so that it can be sent by mail, carried easily or given as a presentA packet of photographs arrived with the mail.3(North American English) (British Englishsachet)a closed plastic or paper package that contains a very small amount of liquid or a powdera packet of instant cocoa mix4[singular] (British English, informal) a large amount of moneyThat car must have cost a packet.5(computing) a piece of information that forms part of a message sent through a computer networkThe data transmission is split into a number of packets of equal size.6(North American English) a set of documents that are supplied together for a particular purposea training packet