goalpost

CIDE DICTIONARY

goalpost, n. 

 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.  [PJC]

OXFORD DICTIONARY

goalpost, n. either of the two upright posts of a goal.

Idiom

move the goalposts alter the basis or scope of a procedure during its course, so as to fit adverse circumstances encountered.

ROGET THESAURUS

goalpost

Arrival

N arrival, advent, landing, debarkation, disembarkation, reception, welcome, vin d'honneur, home, goal, goalpost, landing place, landing stage, bunder, resting place, destination, harbor, haven, port, airport, spaceport, terminus, halting place, halting ground, landing strip, runway, terminal, journey's end, anchorage, return, remigration, meeting, rencounter, encounter, completion, recursion, arriving, homeward bound, here, hither, Int, welcome!, hail!, all Hail!, good-day, good morrow!, any port in a storm.