From Longman Dictionary of Contemporary Englishprepackedpre‧packed /ˌpriːˈpækt◂/ adjective DFprepacked food or other goods are wrapped before they are sent to the shop where they are sold prepacked vegetables
Examples from the Corpus
prepacked• Two separate surveys found that many prepacked sandwiches were being stored at dangerously high temperatures, causing the spread of harmful bacteria. 