- Zoology One of the paired, flexible, segmented sensory appendages on the head of an insect, myriapod, or crustacean functioning primarily as an organ of touch. (noun)
- Something likened to this sensory appendage, as in function or form: sensitive public relations antennae. (noun)
- A metallic apparatus for sending or receiving electromagnetic waves. (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.