What is "couriering"

Usage examples of "couriering".

She beeped off the contact, and composed another message—thought about couriering this one over to avoid public commotion and public pressure, and thought about the hazards of sending Legacy personnel alone and within reach of station police, angry merchants—or Ana-kehnandian.

Possibly they were couriering their messages to each other around the rim, not using com at all.

He'd been couriering one thing and another since they'd arrived, so the Admiral's staff listened when he said, "—in his hands personally.

You'll notice,” I volunteered helpfully, tapping a $30 item with my platinum pen, “the fee for couriering their papers to my office.