One who adheres or follows laws, guidelines, etc.
One who makes observations, monitors or takes notice
A crew member on an aircraft who makes observations of enemy positions or aircraft
A person sent as a representative, to a meeting or other function to monitor but not to participate
A country or other entity which has limited participation rights within an organization.
A sentry etc. manning an observation post
A person who unquestioningly accepts as true whatever their political leaders say or who adopts popular opinion as their own without scrutiny.
People who unquestioningly accept as true whatever their political leaders say or who adopt popular opinion as their own without scrutiny.