The word "heads" can refer to the plural form of "head," which is the upper part of the body containing the brain, eyes, ears, nose, and mouth. It can also denote leaders of a group or organization, or it can refer to the front or top part of something, such as the head of a table. In informal contexts, "heads" can mean people, especially in phrases like "heads up."
The word "head" comes from the Old English "heafod," which meant the top or chief part of something. The term has Germanic roots and is related to similar words in other languages that denote the top or principal part.