1 a large vertical steel tower-like structure supporting high-tension electrical cables
2 a post or tower for guiding pilots or marking a turning point in a race
3 a streamlined aircraft structure for attaching an engine pod, external fuel tank, etc., to the main body of the aircraft
4 a monumental gateway, such as one at the entrance to an ancient Egyptian temple
5 a temporary artificial leg
(C19: from Greek pulon a gateway)
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