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1. Of a liquid, to flow over the top of a container. Turn off the burner before the soup brims over!
2. To exhibit something, such as a trait or emotion, to a great degree. With our trip just days away, the kids are totally brimming over with excitement. This song just brims over with emotion.
brim over (with something)and brim with something
to overflow with something. The basket was brimming over with flowers. I was brimming with confidence after my recent success.