Pall usually describes something that makes a situation feel heavy, gloomy, or less enjoyable, like a dark cloud settling over things. When bad news casts a pall over a celebration, it means the mood shifts from cheerful to somber. If your team loses an important game right before a party, that disappointment might cast a pall over the festivities.

A pall of smoke hanging over a city gives a literal example: thick smoke that blocks sunlight and makes everything feel darker and more oppressive.

Something can also pall (as a verb), meaning it becomes boring or tiresome through repetition. Even your favorite video game might eventually pall if you play it every single day for months. The excitement fades, and what once thrilled you now feels dull. This sense connects to the noun meaning: when something palls, it's like a heavy cloth settling over your enthusiasm.