In American baby-shower tradition, a bridal shower inspired the word “shower.” The metaphor describes guests “showering” the person being honored with gifts, rather than referring to water or bathing.
Baby showers developed from broader European and North American customs of giving practical items to a bride or expectant parent. The bridal-shower model supplied both the name and the basic structure: invited guests gather socially, offer presents, and celebrate an important family transition.
A baby shower is not the same as a christening, naming ceremony, or first-birthday party. Its timing also varies: many are held before birth, while some families prefer a gathering after the baby arrives.
The word “shower” therefore describes generous gift-giving. The same naming pattern appears in other celebrations, including bridal showers and kitchen showers.