Oxford Dictionary English flat-pack noun noun BrE BrE//ˈflæt pæk// ; NAmE NAmE//ˈflæt pæk// (British English) Add to my wordlistjump to other resultsa piece of furniture that is sold in pieces in a flat box and that you have to build yourself You can buy the kitchen as a flat-pack for self-assembly. Oxford Collocations DictionaryFlat-pack is used before these nouns: furniture See full entryCheck pronunciation: flat-pack oxfordlearnersdictionaries.com