Keywords: oblivious, vacant (empty), clueless, unaware
Sign Definition
As a Noun
1. The condition of not knowing about something, especially when it is known by other people or unexpected. English = unawareness, ignorance.
2. The state of not being aware or conscious of what is happening around you. English = oblivion.
As a Verb or Adjective
1. To not know about something, especially when it is unexpected or when others know about it. English = (be) unaware, (be) ignorant of, (be) oblivious to.