This entry introduces the Leadership Sensemaking Cycle of Social Change, a conceptual framework that explains how leaders and movements drive ideological and organizational transformation through three recursive stages: sensebreaking, sensegiving, and senselocking. Sensebreaking disrupts entrenched cognitive frameworks by creating dissonance and questioning dominant narratives. Sensegiving follows by providing new interpretive frameworks and narratives that reframe reality, offering clarity and legitimacy to alternative worldviews. Senselocking then consolidates these ideas through institutional routines, rituals, and norms, embedding them as durable truths resistant to challenge. Drawing on insights from political movements, organizational change, and academic institutions, the framework demonstrates how meaning-making processes shape social realities, from radical vanguard strategies to institutional reforms such as territorial acknowledgements. By emphasizing the cognitive and narrative dimensions of leadership, this cycle provides a nuanced lens for understanding how disruption becomes innovation, and how innovation becomes stabilized as the new normal in cultural, political, and organizational life.