What Does “OOO” Mean

“OOO” usually means “out of office.” People use it to say they are not at work and may not reply right away.

You’ll often see OOO in emails, chat messages, or calendar notes. For example, someone might write “I’m OOO today” to let others know they are away, on vacation, or unavailable.

Meaning & Usage

OOO is a quick and common way to say someone is not working at the moment. It is often used in workplaces to show that a person is away from their desk or not available to answer messages.

Examples

“She’s OOO until Monday.”
“I’ll be OOO this afternoon.”
“Please contact John while I’m OOO.”

Is OOO formal or informal?

OOO is common in work settings and feels short and practical. It is not very formal, but people use it all the time in emails and team chats.

Can OOO mean anything else?

In most everyday business use, OOO means “out of office.” In other contexts, it can have different meanings, but this is the most common one.