Search Dictionary
Definition of k2

k2

JUMP TO:

• noun

1

The second-highest mountain on Earth, located in the Karakoram range on the border between Pakistan and China, renowned among mountaineers for its extreme difficulty and treacherous weather conditions.


2

A colloquial or brand name for a synthetic cannabinoid, a chemically engineered substance designed to mimic the psychoactive effects of marijuana, often causing severe and unpredictable health risks.

Example

"Public health officials issued urgent warnings after a contaminated batch of K2 led to a spike in emergency room visits across the city."

Word Nuance & Usage

K2 primarily serves as the official designation for the world's second-highest mountain, but it is also widely used as a street name for synthetic cannabinoids; the stark difference in context (mountaineering versus pharmacology/law enforcement) prevents confusion.

Word Origin & Etymology

The mountain was named 'K2' in 1856 by Thomas George Montgomerie during the Great Trigonometrical Survey of British India, where 'K' stands for the Karakoram range and '2' indicates it was the second peak recorded. The synthetic drug adopted the name in the early 2000s, likely alluding to a 'high' peak.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of K2. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/k2
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Dictionary & Reference
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.