Sentence:  Now we are liberal with our innermost secrets, spraying them into the public <WSD>ether</WSD> with a generosity our forebears could not have imagined. Where we once sent love letters in a sealed envelope, or stuck photographs of our children in a family album, now such private material is despatched to servers and clouds operated by people we don't know and will never meet. 
Meaning of the word marked with <WSD> tags:  The atmosphere or space as a medium for broadcasting radio and television signals; also, a notional space through which Internet and other digital communications take place; cyberspace.