stereotype
definition
a widely held but oversimplified and generalized belief or idea about a particular group of people or things
example
Many films perpetuate the stereotype that all teenagers are rebellious and irresponsible.
synonyms
generalizationstereotypecliché
word origin — The word 'stereotype' comes from the French 'stéréotype', which derives from the Greek 'stereos' meaning 'solid' and 'typos' meaning 'impression' or 'type'.