noun
the upper edge or lip of a container, typically a cup or a glass
verb
fill or be full to the point of overflowing
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The cup was filled to the brim with hot tea.
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She wore a hat with a wide brim to shield her face from the sun.
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I'm feeling on top of the world, my happiness is at the brim.
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Her excitement was at the brim as she waited for the results of the competition.