Rig/rɪɡ/ Definition 1 of 4Pro Tip 1/2Prepare Equipment Use 'rig' when discussing assembling items for practical use. We will need to rig the sound system for the concert. Pro Tip 2/2Informal Situations 'Rig' is casual and can be used informally when talking about setting up equipment. Can you rig up some lights in the backyard?