- The act or an instance of inoculating, especially the introduction of an antigenic substance or vaccine into the body to produce immunity to a specific disease. (noun)
- Informal A preemptive advertising tactic in which one party attempts to foresee and neutralize potentially damaging criticism from another party by being the first to confront troublesome issues. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.