Annex/ˈæneks/ Definition 1 of 3Pro Tip 1/3Physical Expansion Used when physically expanding something like a building or land area. The library will annex the vacant lot next door. Pro Tip 2/3Administrative Use Often used in administrative or bureaucratic contexts. The company's expansion plan includes annexing three new storefronts downtown. Pro Tip 3/3Non-Aggressive Tone Doesn't necessarily imply force; can be a neutral or positive action. The university decided to annex the adjacent private research facility.