Business Process Model and Notation (BPMN)

7 Definitions

The industry-standard graphical representation for business process workflow diagrams.
Business Process Modelling Notation – A standard for graphically representing models of business processes.
The Object Management Group (OMG) developed a standard Business Process Model and Notation (BPMN). The primary goal of BPMN is to provide a notation that is readily understandable by all business users, from the business analysts that create the initial drafts of the processes, to the technical developers responsible for implementing the technology that will perform those processes, and finally, to the business people who will manage and monitor those processes. Thus, BPMN creates a standardized bridge for the gap between the business process design and process implementation.
Business Process Modeling Notation is a graphical notation that describes the logic of the Business process steps. This notation has been especially designed to coordinate the sequence of the processes and the messages that flow between the participants of the different activities. 
defined by Bizagi
A graphic notation for representing business processes. BPMN defines a Business Process Diagram, which is based on flowcharting techniques customized for business process, and a mapping to BPEL executable semantics. The BPMN industry standard is maintained by the OMG.
defined by Steelnet Solutions, Inc.
Business Process Modeling Notation (BPMN) is a graphical system for the modeling of business processes using a standardized notation developed by the Object Management Group (OMG). BPMN serves as a communicative tool that enables the smooth transition between process design and implementation. 
A standard set of graphical shapes and conventions with associated meanings that can be used in modeling a business process.