Definition of "at work" []

• At one's workplace. (phrase)
• During customary work time. (phrase)
• Working, in the process of doing work. (phrase)

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• "Upon returning from a late lunch, astronaut Al Bean returned to the Astronaut Office and saw Neil at work at his desk in the office the two men shared."
• "The episode started four days earlier when, while at work in his office at Edwards, Neil got the phone call from Deke Slayton, head of the astronaut office at the Manned Spacecraft Center, then still under construction on Clear Lake, southeast of Houston."
• "Immediately Drake invited Kenneth L. Levin and John Ryken, two of the principal Bell engineers at work on the concept a third was John G. Allen Jr., to Edwards for consultation."