e ‧ ther /ˈiːθə $ -ər/ BrE AmE noun
[ Date: 1300-1400 ; Language: Latin ; Origin: aether , from Greek aither , from aithein 'to catch fire' ]
1 . [uncountable] a clear liquid used in the past as an ↑ anaesthetic to make people sleep before an operation
2 . the ether
a) the space through which radio waves or computer signals travel:
voices coming through the ether
b) ( also aether British English ) literary the upper part of the sky