plural of projective Hilbert space

plural of real vector space

plural of topological vector space

plural of parallel dead space

(politics, Internet slang, LGBT) A utopian society proposed by far-left activists where gender, wealth, and work become obsolete and everyone lives in luxury.

plural of anti-de Sitter space

A vehicle that travels through space.

(informal, childish) An astronaut, often a male astronaut.

(astronautics) A vehicle that flies through space.

(philately) A stamp in poor condition used to fill a space in an album until a better quality example becomes available, or if the better example is prohibitively expensive.