boss
n. countable A2 Elementary Oxford US //ˈbɑs// UK //bˈɒs// boss
n. the person who is in charge of you at work. You use this word for someone who gives you tasks and makes decisions for the team.
n. a person who exercises control or authority over workers or an organisation. Informal in register; often used as a direct address or to describe the primary decision-maker in a hierarchy.
I need to ask my boss for a day off.
The new boss plans to change the office layout to encourage more collaboration between departments.
While the formal hierarchy lists him as a manager, he acts as the boss of the entire operation, overseeing every minor detail of the production line.
Usage
Commonly used as a vocative ('Yes, boss') in informal settings to acknowledge authority.