1. The process of increasing the size, capacity, or scope of the back or rear portion of something, such as a building, vehicle, or device
The company planned a back expansion of the warehouse to increase storage capacity.
A empresa planejou uma expansão traseira do armazém para aumentar a capacidade de armazenamento.
2. In phonetics and linguistics, the movement of a vowel sound toward the back of the oral cavity
The back expansion of the vowel occurred during the linguistic evolution of the dialect.
A expansão traseira da vogal ocorreu durante a evolução linguística do dialeto.
3. In exercise and fitness, the process of developing or strengthening the back muscles
His training regimen focused on back expansion to improve posture and strength.
Seu regime de treinamento focou na expansão das costas para melhorar a postura e a força.