k

Used primarily in informal or semi-formal contexts to denote the number 1,000. It is most common in discussions regarding money, salaries, and digital metrics. In these contexts, it functions as a shorthand that simplifies large numbers for quick reading and communication.

In the context of athletics, specifically running, "k" refers to a kilometer. A "5k" or "10k" refers to a race of 5 or 10 kilometers respectively. In this specific usage, it is standard terminology across both casual and professional sporting contexts.

On social media platforms, "k" is the universal shorthand for thousands of followers, likes, or views (e.g., 20k likes). This usage is strictly digital and informal.

While widely accepted in business emails, texting, and casual conversation, "k" should be avoided in formal academic writing or official legal documents, where the full number or the word "thousand" is required for precision and professionalism.