From Longman Dictionary of Contemporary Englishpierpier /pɪə $ pɪr/ ●○○ noun [countable] 1 
TTWa structure that is built over and into the water so that boats can stop next to it or people can walk along it a yacht moored at a pier strolling along Brighton Pier2 TBCa thick stone, wooden, or metal post that is used to support something
TTWa structure that is built over and into the water so that boats can stop next to it or people can walk along it a yacht moored at a pier strolling along Brighton Pier2 TBCa thick stone, wooden, or metal post that is used to support somethingExamples from the Corpus
pier• The cruise boards at 7 p.m. at Pier 33.• Inside the church, where the lighting is subdued but not dim, the central dome is supported on eight piers.• He stood with the others on the great stone pier.• They had applauded him on the pier.• The green car was behind them on the pier, in the third line of queuing cars.• Time, weather, and long neglect had taken the piers beyond dilapidation.• He said he had managed to swim under the pier and had found a ledge.• The pier was filled with hundreds of people.Origin pier (1100-1200) Medieval Latin pera 