IPA: /ˌpriːəˈsɛmbəld/
KK: /priˈæsembəld/
Put together in advance, usually in a factory, so that it is ready to use right away.
The furniture came preassembled, making it easy to set up in my living room.
To have been put together in advance before being sold or used.
The furniture was preassembled to make it easier for customers to set up at home.
Past: preassembled
Past Participle: preassembled
Preassembled → It is formed from "pre-" (meaning before) and "assemble" (from Latin "assimulare", meaning to bring together). The word "preassembled" means put together before a certain time or event.
Think of things being 'brought together' ('assemble') 'before' ('pre-') they are needed — that's what preassembled means.