To refer to something briefly and without going into detail. She mentioned the meeting in passing, but didn't provide any details.
To speak about or bring up a subject in conversation. He mentioned his plans to travel abroad next year.
To cite or name someone formally, often as a form of recognition or praise. The committee mentioned her in their annual report for outstanding service.
To tag or reference a user on social media by placing the “@” symbol before their username. Remember to mention me in the post so I can see it.