Constitution is one of the six primary ability scores in Dungeons & Dragons (D&D) . It represents a characters physical resilience, stamina, and health. A high constitution score indicates superiority in all these attributes. Constitution is crucial for determining a characters hit points and saving throws related to endurance or survival. All characters gain additional hit points from Constitution, so most player characters have at least moderately high Constitution. Every time a character levels up, they add their Constitution modifier to their hit dice roll to determine their new maximum hit points. Constitution is also important for saving throws and fatigue-based general checks. Constitution checks are uncommon, and no skills apply to Constitution checks, because the endurance this ability represents is largely passive rather than involving a specific effort on the part of a character or monster.

In summary, Constitution is a measure of a characters physical resilience and stamina in D&D. It is important for determining hit points, saving throws, and fatigue-based general checks. A high Constitution score is beneficial for all characters, but especially for those who fight in hand-to-hand combat because they tend to draw more attacks and suffer more damage as a result.