انگلیش پلاس

To flag something up is to emphasise its importance, or to mention it so that others know about it.

Examples:

At the meeting Martin flagged up the issue of late payments. He said that we hadn't paid our suppliers for three months.

There are a couple of points that I'd like to flag up today: one is the increasing number of customer complaints and the other is the problem with our computer system.

Take note:

If you are flagging, it means you are becoming weaker and running out of energy.

Example: