pier Definition

1a. A structure built of stone, wood or iron, projecting into water for use as a landing-stage or breakwater;

Thesaurus: dock, wharf, landing, quay, jetty.
1b. Such a structure used as a promenade with funfair-like sideshows, amusement arcades, etc.
2. A pillar supporting a bridge or arch.
3. The masonry between two openings in the wall of a building.