fantasy, daydream; something imagined / (Buddhism) thought that exhibits attachment to sunyata

(country) Kuwait

vacuum

(mathematical analysis) Banach space - a normed vector space which is complete, in the sense that Cauchy sequences converge

(mathematics, geometry) Euclidian space - a space where the prinicples of Euclidean geometry apply.

(electronics) vacuum tube

(idiomatic) waste time on the way, loiter on the way

something extremely uncommon

living space

airbase (military airport)