closed universe

(cosmology) a universe that is spatially closed and in which there is sufficient matter to halt the expansion that began with the big bang; the visible matter is only 10 percent of the matter required for closure but there may be large amounts of dark matter

（宇宙論）空間的に閉じており、ビッグバンで始まった膨張を停止させるのに十分な物質が存在する宇宙；可視物質は閉鎖に必要な物質の10パーセントにすぎないが、大量の暗黒物質が存在する可能性がある