v. con·cen·trat·ed, con·cen·trat·ing, con·cen·trates
a. To direct or draw toward a common center; focus.
b. To bring into one main body: Authority was concentrated in the president.
2. To make (a solution or mixture) less dilute.
a. To converge toward or meet in a common center.
b. To increase by degree; gather: "Dusk began to concentrate into full night" (Anthony Hyde).
2. To direct one's thoughts or attention: We concentrated on the task before us.
A product that has been concentrated, especially a food that has been reduced in volume or bulk by the removal of liquid: pineapple juice concentrate.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.