"Wane" refers to the process of gradually decreasing in size, amount, or intensity. This term is often used in relation to the moon, specifically when it transitions from a full moon to a new moon. During this phase, the visible portion of the moon diminishes, leading to a smaller appearance in the night sky. In a broader context, "wane" can describe any situation where something diminishes or declines over time. For example, a person's enthusiasm for a hobby may wane as their interests change, or a trend in fashion may wane as new styles emerge.