Definitions of pier:

• noun:   a platform built out from the shore into the water and supported by piles; provides access to ships and boats
• noun:   a support for two adjacent bridge spans
• noun:   (architecture) a vertical supporting structure (as a portion of wall between two doors or windows)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #11001)