Distend/dɪˈstend/ Definition 1 of 2Pro Tip 1/3Interior Pressure Emphasizes that distention is caused by pressure from within rather than external forces. The balloon distended as the child blew air into it. Pro Tip 2/3Physical Change Use when describing a noticeable change in size or shape of an object or part. Holding my breath, my cheeks distended. Pro Tip 3/3Metaphorical Use Can describe things that swell in a non-literal sense, like emotions or tension. Excitement distended within the crowd as the concert began.