Modern management in institutions or organizations consists in the creation of an innovative mentality which focuses on permanent learning and sustains the growth of competitiveness and the achievement of goals. Thus the authority enjoyed by nursing in healthcare institutions aims to achieve changes, engendering behavior that enables collective interaction for the benefit for healthcare institutions. The present research aimed to reveal the manner and meaning in which authority is exercised by nurses in the course of their managerial activity in healthcare institutions. Methodology: Qualitative descriptive research in which participated twenty-three senior level nurse managers in healthcare institutions, with interviews conducted using a guide, based on the lead questions and, thus, the research objectives. The criteria for inclusion were that pariticpants had worked as Director of Nursing for more than two years. The data was collected in the managers' working environment, with the two dimensions-the meaning and type of the authority that nurses possess-selected from the most significant data and then analyzed and discussed in terms of Blumer's theory of symbolic interactionism. The results revealed the meaning of authority, which is symbolized as respect and discipline, while its exercise requires specific knowledge. The characteristics of the authority wielded by the nurse were also identified, with the moral value of the manager considered to be of the utmost importance. The types of authority exercised by nurses were identified as either formal or moral. The present study concludes that social representation and interaction are revealed as integral by the measurement of authority conducted here, where meaning is distinct to the essence and philosophy of the profession, as they are immersed in an indispensible componentmanagerial and organizational communication.