A bridge was a structure that was built over a body of water or a low area to allow passage over it.
The Golden Gate Bridge was a bridge in San Francisco, California, and was built in the 1930s. It spanned the Golden Gate, the border between the San Francisco Bay to the east and the Pacific Ocean to the west. The bridge was perhaps the most iconic symbol of the city. (Star Trek: The Motion Picture et al)
The Ba'ku built a bridge on their homeworld which connected their village with the hills and fields on the other side of the lake. When the Son'a attacked the village, the bridge was one of the structures that was hit. (Star Trek: Insurrection)