When more than half of the moon is visible, it's in either the waxing gibbous or waning gibbous phase.

Here's a breakdown:

* Waxing Gibbous: The moon is growing larger and more than half illuminated, moving from first quarter to full moon.

* Waning Gibbous: The moon is shrinking, with more than half illuminated, moving from full moon to last quarter.

So, it depends on the direction the illuminated portion is growing or shrinking.