When you display something, you show everyone. If you run up to someone in the street, throw your arms around her, and plant a big kiss on her face, you're displaying your affection for all the world to see.
Besides public displays of emotion, a display can also be common and lifeless. Department store windows often have elaborate displays of the latest fashions, and your computer screen can also be called a display. If you’re especially proud of your butterfly collection, you can put it on display in your office. When showing off for the ladies, peacocks fan out their colorful tail feathers, and that, too, is called a display — a word for male animal courtship behavior.