“It is the study of individual as well as group behavior within organization” . OR
“A field of study that investigates the impact that individuals, groups and structure have on behavior within organization for knowledge towards improving an organization’s effectiveness” .
Organization behavior is a field of study meaning that it is a distinct area of expertise with a common body of knowledge. It studies three determinants of behavior in organization those are individuals, groups and structure. In addition it applies the knowledge to gain about individuals, groups and effect of structure on behavior in order to make organization work more effectively.
Now the organizational behavior has become the widely accepted approach it is beginning to develop and mature as an academic discipline to improve our effectiveness in producing goods and services.
Explain S-O-B-C model?
An SOBC model was developed to identify the major variables in organizational behavior and show how they relate to one another. The letters stands for Stimulus, Organism, Behavior and Consequence. Based on social learning framework. SOBC model has three frameworks 1. Cognition Behavior Framework 2. Behavioral Framework 3. Social Framework
This model recognizes the interactive nature of environment (S and C) interpersonal, cognition (O) and behavioral (B) variables. A three variable model consisting of antecedent cues or stimuli (S) behaviors (B) and consequences (C) is typically used. However, when the human organism (O) representing cognitive mediating process is included as in a social learning approach then the four term model results.
The S variable in the model stands for the stimulus or, more broadly the environmental situation. Common stimuli include lights, sounds, odors, pinpricks and person. Stimuli goad humans into action, interpret what they are doing, and direct their choices.
Bibliography:  Lecture Notes  Robbins Book, Edition 14th  Fred Luthans, Edition 3rd  http://wiki.answers.com/Q/Define_S-O-B-C_model_in_OB_with_example