geek (gēk) Slang
a. A person regarded as foolish, inept, or clumsy.
b. A person who is single-minded or accomplished in scientific or technical pursuits but is felt to be socially inept.
2. A carnival performer whose show consists of bizarre acts, such as biting the head off a live chicken.
tr.v. geeked, geek·ing, geeks
To excite emotionally: I'm geeked about that new video game.
[Perhaps alteration of dialectal geck, fool, from Low German gek, from Middle Low German.]
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.