Using Walker and Avant's approach, a concept analysis was performed to develop a working definition of caregiver fatigue. Defining attributes of caregiver fatigue identified were "fell into role" by default, outside the norm of role expectations, excess caregiving demand, and exposure to prolonged period of caregiving. Model, related, and contrary cases were developed. Antecedent, consequences, and empirical referent of caregiver fatigue were also identified. Lastly, a working definition of caregiver fatigue was developed.