1. The state or quality of being precise; exactness.
a. The ability of a measurement to be consistently reproduced.
b. The number of significant digits to which a value has been reliably measured.
1. Used or intended for accurate or exact measurement: a precision tool.
2. Made so as to vary minimally from a set standard: precision components.
3. Of or characterized by accurate action: precision bombing.
[Latin praecīsiō, praecīsiōn-, a cutting off, from praecīsus, past participle of praecīdere, to cut off; see PRECISE.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.