AUX
n. countable B2 Upper Intermediate US //ˈoʊ// aux
n. a person who helps the main person in a group or project. You use this when someone supports the leader but is not the leader themselves.
n. a person who provides assistance or support to a principal figure, often in a secondary or subordinate role. Informal register; common in business and creative contexts.
She acts as an aux for the lead singer.
The project manager hired an aux to handle the daily emails.
In the band's dynamic, the aux provides the steady rhythm that allows the lead vocalist to experiment with complex melodies.