Looking up...
She is at work on a new project.
She is currently performing her job duties on a new project.
Engaged in one's employment or professional activities.
The office is empty because everyone is at work.
The office is empty because everyone is performing their job duties.
I'll call you later; I'm at work right now.
I'll call you later; I'm currently engaged in my job.
Commonly used to indicate physical presence at a workplace or active engagement in work-related tasks.
In operation or functioning (of machinery, systems, or processes).
The factory's machinery is at work 24 hours a day.
The factory's machinery is operating continuously.
The immune system is at work fighting the infection.
The immune system is actively functioning to combat the infection.
Used to describe systems or biological processes that are actively performing their function.
Remember that 'at work' specifically refers to being engaged in employment or professional activities, not just being in a workplace building. For example, 'She's at work on her laptop' implies she's working, not just physically present.
Use 'at work' when referring to employment or active engagement in work tasks. For physical presence without work activity, use 'in the office' or 'at the workplace'.
The phrase combines the preposition 'at' (indicating position or state) with 'work' (from Old English 'weorc', meaning labor or activity). The idiomatic use of 'at' to denote engagement in an activity dates back to Middle English.
The phrase is typically used to describe the state of being actively engaged in one's employment. It can refer to physical presence at a workplace or metaphorical engagement in work-related activities. In technical contexts, it describes systems or processes that are functioning.