noun
an excessive amount of something
verb
to indulge in something, especially to excess
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The banquet had a surfeit of food, with multiple courses being served.
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I ate so much dessert that I feel like I have a surfeit of sugar in my system.
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I can't believe I bought another surfeit of clothes during the sale.
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His surfeit of wealth led to a sense of emptiness and lack of purpose in his life.