D defs.my
Entry 1 sense Webster, 1913

goalpost

/gōl'-pōstˌ/ · IPA /ˈɡoʊlpoʊst/
01 n. One of two posts supporting a crossbar which forms a goal{3}, especially in American football; also, in football the entire structure consi…
  1. 1.
    One of two posts supporting a crossbar which forms a goal{3}, especially in American football; also, in football the entire structure consisting of the posts, crossbar, and two uprights. To score a goal by kicking the football, the ball must pass above the crossbar and between the vertical lines formed by the uprights.(Sport)