Evidence of weight stigma and its harmful consequences have led to increased attention to the words that are used to talk about obesity and body weight, including calls for efforts to carefully consider weight-related terminology and promote respectful language in the obesity and medical fields. Despite increased research studies examining people's preferences for specific words that describe body weight, there has been no systematic review to synthesize existing evidence on perceptions of and preferences for weight-related terminology. To address this gap, the current systematic review identified 33 studies (23 quantitative, 10 qualitative) that examined people's preferences for weight-related terminology in the current research literature (from 1999 to 2019). Across studies, findings generally suggest that neutral terminology (eg, "weight" or "unhealthy weight") is preferred and that words like "obese" and "fat" are least acceptable, particularly in provider-patient conversations about weight.However, individual variation in language preferences is evident across demographic characteristics like race/ethnicity, gender, and weight status. Of priority is future research that can improve upon the limited diversity of the existing literature, both with respect to sample diversity and the use of culturally relevant weight-related terminology, which is currently lacking in measurement. Implications for patientprovider communication and public health communication are discussed. K E Y W O R D S language, obesity, terminology, weight stigma 1 | INTRODUCTION Discourse about obesity and weight control remains prominent in public health initiatives, medical care and health-related media campaigns. As body weight is entangled with societal and cultural meanings that infer evaluative dimensions of one's identity, 1,2 it can be a complex and emotionally charged topic to communicate about. The words used to refer to people's body weight can affect their self-perceptions, attitudes and behaviours. Experimental research shows that even a brief exposure to body-related words can induce automatic evaluations and judgements of body shape and weight, and trigger negative affective responses. 3 These negative, and often implicit, associations 4,5 are a symptom of broader societal weight stigma, so pervasive that recent evidence points to the globalization and presence of weight stigma in both developed and developing countries around the world. 6Because obesity is such a highly stigmatized condition, people with higher weight are vulnerable to weight-based prejudice, victimization and discrimination. 7,8 These experiences contribute to harmful health consequences for targets of weight stigma and can impair both psychological wellbeing and physical health. 9-11 Studies further indicate that healthcare providers' use of stigmatizing communication in consultation with a science literature librarian at the author's institution. Data extraction and synthesis were conducted in accordance with Preferred Reporting Items for Systematic Revie...