Assemble/əˈsembl/ Definition 1 of 4Pro Tip 1/3DIY Context Used when describing self-assembly of products, common in furniture or toys. After moving, they had to assemble the bookshelf from the flat-pack. Pro Tip 2/3Step by Step Suggests a process with instructions or stages, often provided in a manual. Refer to the manual to assemble the parts in the correct order. Pro Tip 3/3Hands-on Activity Involves physical work or activity, not just conceptual or planning stages. The kids were excited to assemble the model airplane.