English▸ noun 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.