Japanese edit

For pronunciation and definitions of しんくう – see the following entry.
真空
[adjective] (rare) vacant, empty
[noun] [from 1876] (physics) vacuum: a region of space that contains no matter, a void
[noun] [from 1907] (figurative) a blank, an empty slate
[noun] [from 751] (Buddhism) sunyata: void, emptiness, non-existence; also, in the early Buddhist schools, enlightenment, nirvana
(This term, しんくう, is the hiragana spelling of the above term.)