1. based on or characterized by drawing conclusions from insufficient evidence or too few examples; too broad or sweeping in scope
Usage: British spelling (American: overgeneralized); commonly used in academic and critical contexts

1. past tense and past participle of overgeneralise; to make or state something in overly broad terms without sufficient supporting evidence
Usage: British spelling (American: overgeneralized); transitive or intransitive use

Examples

• The study's conclusions were overgeneralised because the sample size was too small.
• He overgeneralised when he claimed that all teenagers are lazy.
• The report made overgeneralised statements about the entire industry based on limited data.
• Critics argued that the author overgeneralised the experiences of one community to all similar groups.
• It is easy to overgeneralise from a single case study.
• The overgeneralised claim ignored important regional differences.
• She overgeneralised her personal experience into a universal rule.