- Of, engaging in, or given to armed aggression: an invasive military force. (adjective)
- Marked by the tendency to spread, especially into healthy tissue: an invasive carcinoma. (adjective)
- Of or relating to a medical procedure in which a part of the body is entered, as by puncture or incision. (adjective)
- Tending to intrude or encroach, as upon privacy. (adjective)
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.