Contact - TUBE FLARING TUBE FLARE ORFS FLARE 37 FLARE 45 FLARE

So it means you have filled a hole or any opening of something.

The phrase "meeting slot" is correct and usable in written English. You can use it to refer to a scheduled meeting time, or a time slot that has been set aside for a meeting or appointment. For example, "I have a meeting slot at 10:00 AM tomorrow.".