v. de·duct·ed, de·duct·ing, de·ducts
1. To take away (a quantity) from another; subtract.
2. To derive by deduction; deduce.
To take away a desirable part: Poor plumbing deducts from the value of the house.
[Middle English deducten, from Latin dēdūcere, dēduct-, to lead away or down; see DEDUCE.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.