a transparent dome on the top of an aircraft, through which observations can be made, esp of the stars
2.
a large domed sports stadium
astrodome in American English
(ˈæstroʊˌdoʊm; ˈæstrəˌdoʊm)
noun
a domelike transparent structure for housing astronomical or navigational instruments; specif., such a structure mounted on top of an aircraft fuselage for the navigator