What does "zealous" mean?

The term "zealous" refers to having or showing great energy and enthusiasm in pursuit of a cause or objective. It embodies a sense of passion and eagerness, often related to fervently supporting something or someone. When someone is described as zealous, it indicates that they are highly motivated and dedicated, typically showcasing a strong emotional investment in their pursuits or beliefs. This aligns perfectly with the meaning of being "passionate and enthusiastic," which is why this choice stands out as the correct definition.

The other choices describe states of disinterest or lack of motivation, which are contrary to the essence of being zealous. They reflect indifference or a lack of engagement rather than the vibrant enthusiasm associated with zeal.