Very skilled or accomplished. See Synonyms at proficient.
A highly skilled person; an expert: "political consequences in getting rid of all the skeptics, unbelievers, and adepts of rival faiths" (Gene Lyons).
[Latin adeptus, past participle of adipīscī, to attain : ad-, ad- + apīscī, to grasp.]
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.