definition
One who makes observations, monitors or takes notice
example
Most impartial observers agreed that Sampras had not served well.
definition
One who adheres or follows laws, guidelines, etc.
example
I shall be an observer of the local customs.
definition
A person sent as a representative, to a meeting or other function to monitor but not to participate
example
The UN sent many observers to the country's first elections.
definition
A country or other entity which has limited participation rights within an organization.
example
The Vatican and Palestine have observer status at the UN.
definition
A crew member on an aircraft who makes observations of enemy positions or aircraft
example
The only crew-member to survive the crash was the Canadian observer.
definition
A sentry etc. manning an observation post
example
We waited till dusk when the observers' vision was poorest.