Nosiness is the habit of prying into other people's private business when it's none of your concern. A nosy person asks too many personal questions, eavesdrops on conversations not meant for them, or peeks at things like someone's diary or text messages.

Everyone feels curious sometimes about what others are doing, but nosiness crosses a line. If your friend tells you they're upset about something and you ask supportive questions, that's caring. But if you start interrogating them about every detail or spreading what they told you to others, that's being nosy.

Nosy people often justify their behavior by claiming they're “just interested” or “trying to help,” but real concern respects boundaries. When your mom asks about your day at school, she's being a parent. When your neighbor questions your mom about family matters that don't affect them, that's nosiness.

While staying informed about things that affect you makes sense, nosiness means inserting yourself into situations that are genuinely none of your business. People usually avoid sharing things with nosy individuals because they can't be trusted to respect privacy.