Mobbing in the context of human beings means bullying of an individual by a group in any context, such as a family, school, workplace, neighbourhood, or community.
When it occurs as emotional abuse in the workplace, such as "ganging up" by co-workers, subordinates or superiors, to force someone out of the workplace through rumour, innuendo, intimidation, humiliation, discrediting, and isolation, it is also referred to as malicious, nonsexual, nonracial, general harassment.
Read more about Mobbing: Etymology, Mobbing in The Workplace, Mobbing At School, Mobbing in Academia, Sham Peer Review As Mobbing, Checklist of Mobbing Indicators