a magazine that aims to raise the political 'consciousness' of teenagers [=to make teenagers more aware of political issues]
a crisis that has faded from the public 'consciousness' [=that the public no longer remembers or thinks about]
She experienced a brief loss of 'consciousness'. = She 'lost consciousness' [=became unconscious] briefly.
(..) - There's no glass. - Force field. There's more I have to tell you. Come on. Are you ready? - Who are you? - I am the Borg. That is a contradiction. The Borg have a collective consciousness. There are no individuals. I am the beginning, the end, the one who is many. I am the Borg. Greetings. (..)1996 Star Trek: First Contact