Sure. Here are three well-structured arguments criticizing the Oxford Dictionary's definition of art:

1. The definition is too narrow. It focuses on visual art, such as painting and sculpture, and excludes other forms of art, such as music, literature, and dance.
2. The definition is too subjective. It says that art is to be appreciated primarily for its beauty or emotional power, but these are subjective qualities that different people will value differently.
3. The definition is too elitist. It implies that art is something that is only appreciated by a select few people with refined tastes.
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