1. Exceeding what is necessary or natural; superfluous.
2. Needlessly wordy or repetitive in expression: a student paper filled with redundant phrases.
3. Of or relating to linguistic redundancy.
4. Chiefly British Dismissed or laid off from work, as for being no longer needed.
5. Electronics Of or involving redundancy in electronic equipment.
6. Of or involving redundancy in the transmission of messages.
a. Made up of identical repeating nucleotide sequences that do not code for genes. Used of DNA.
b. Relating to or being a gene that has multiple codons for the same amino acid.
[Latin redundāns, redundant-, present participle of redundāre, to overflow : re-, red-, re- + undāre, to surge (from unda, wave; see wed-1 in the Appendix of Indo-European roots).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.
American Heritage Dictionary Products
The American Heritage Dictionary, 5th Edition
The American Heritage Dictionary of Idioms
The American Heritage Roget's Thesaurus
Curious George's Dictionary
The American Heritage Children's Dictionary
The American Heritage Dictionary of Indo-European Roots
The American Heritage Student Grammar Dictionary
The American Heritage Desk Dictionary + Thesaurus
The American Heritage Science Dictionary
The American Heritage Dictionary of Business Terms
The American Heritage Student Dictionary
The American Heritage Essential Student Thesaurus