1. a person who watches or notices something: "to a casual observer, he was at peace"
▪ a person who follows events, especially political ones, closely and comments publicly on them: "some observers expect interest rates to rise"
▪ a person posted to an area in an official capacity to monitor political or military events: "elections scrutinized by international observers"
▪ a person who attends a conference, inquiry, etc., to note the proceedings without participating in them:"he had been invited to attend the meeting as an observer"
