OOB stands for which phrase?

• A. In Building
• B. Out Of City
• C. Out Of Grounds
• D. Out Of Building

Answer: (D)

Understanding the acronym in safety and facility communication helps you know what to report and where someone is. OOB means the person is outside a space, so the phrase that fits the context is Out Of Building. That wording clearly communicates location during emergencies or drills, where being outside the structure is the point to note. The other options describe being inside (In Building) or refer to locations that aren’t standard phrases used for this purpose (Out Of City, Out Of Grounds). In some nursing contexts OOB can also mean Out Of Bed, but for this item the intended meaning is outside the building.