Impersonal describes something that lacks warmth, personal connection, or individual character. When a teacher grades papers in an impersonal way, she treats every student's work exactly the same, without considering their individual efforts or circumstances. An impersonal email might begin “Dear Customer” instead of using your actual name.

Large organizations often feel impersonal because you interact with different employees each time, none of whom know your history or care about your specific situation. Calling a huge company's customer service line can feel impersonal when you have to explain your problem to a recording or navigate through endless menu options before reaching a real person.

The word can also describe something factual and objective, without emotional bias. A scientist writes in an impersonal style, focusing on data and observations rather than feelings. News articles aim for an impersonal tone, reporting facts without inserting the writer's opinions.

Notice that impersonal isn't always negative. Sometimes you want impersonal treatment: a judge should make impersonal decisions based on the law, not personal feelings about the people involved. But in relationships and everyday interactions, too much impersonal behavior can make people feel like they're just numbers rather than individuals who matter.