Definitions
1.nounA raised platform built from the shore out over water, supported on piles; used to secure, or provide access to shipping; a jetty.
2.nounA similar structure, especially at a seaside resort, used to provide entertainment.
3.nounA structure that projects tangentially from the shoreline to accommodate ships; often double-sided.
4.nounA structure supporting the junction between two spans of a bridge.
5.nounA rectangular pillar, or similar structure, that supports an arch, wall or roof, or the hinges of a gate.