Why are tomatoes, peppers, cucumbers, and squashes classified as fruits?

Botanically, tomatoes, peppers, cucumbers, and squashes are classified as fruits because they are the ripened ovary of a flowering plant that contains seeds.12

While these items are often referred to as vegetables in culinary and nutritional contexts—where the term "vegetable" typically describes edible plant parts like roots, stems, or leaves—this is a functional distinction rather than a biological one. In botany, a fruit is defined specifically as the reproductive body of a seed plant, serving the primary purpose of protecting and disseminating seeds.231

Because tomatoes, peppers, cucumbers, and squashes develop from a flower's ovary after fertilization and house the seeds necessary for the plant's reproduction, they meet the technical criteria for being fruits. The common confusion arises because these botanical fruits lack the sweet, pulpy characteristics often associated with the popular, grocery-store definition of "fruit," but their biological classification remains consistent regardless of their flavor profile or how they are prepared in a meal.1342