It means opposite, or opposed to, or counteracting. In the world of technology, you may hear about anti-virus programs, or anti-adware programs, or anti-spyware programs...these are all software programs designed to counteract the damaging effects of viruses, adware or spyware. Visit these defintions to get information about anti- programs you need to download and run regularly.

See also : negative growth  
NetLingo Classification: Technical Terms