1. The act of responding.
2. A reply or an answer.
3. A reaction, as that of an organism or a mechanism, to a specific stimulus: a microphone's response to certain frequencies; response by the immune system to a pathogen.
a. Ecclesiastical Something that is spoken or sung by a congregation or choir in answer to the officiating minister or priest.
b. A responsory.
[Middle English respons, from Old French, from Latin respōnsum, from neuter past participle of respondēre, to respond; see RESPOND.]
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