 The Sedentary Behavior Research Network, SBIN, conducted a terminology consensus project to develop standardized definitions for commonly used terms in sedentary behavior research. This included physical inactivity, stationary behavior, sedentary behavior, standing, screen time, non-screen-based sedentary time, sitting, reclining, lying, sedentary behavior pattern, bouts, breaks and interruptions. A conceptual model and consensus definitions were developed based on feedback from 87 SBIN members who participated in an online survey. The results of this project provide standardized definitions for these terms which can be used in future research, interventions, policies and practices related to sedentary behaviors. This article was authored by Mark S. Tremblay, Salomi Orbot, Joel D. Barnes and others.