Mob/mɑːb/ Definition 1 of 4Pro Tip 1/3Negative Connotation The term often implies that the crowd is unruly or prone to violence. The peaceful demonstration turned into an angry mob. Pro Tip 2/3Large Numbers Use 'mob' for big groups, not small gatherings of people. A mob of people filled the city square. Pro Tip 3/3Disorderly Behavior The word 'mob' suggests a lack of order or control among the people. Police struggled to contain the mob's behavior.