In the context of a business or startup, runway refers to the amount of time that a company has before it runs out of cash or other resources and is unable to continue operating. Runway is typically measured in months and is calculated by dividing the company's current cash and other liquid assets by its monthly burn rate, which is the amount of money that the company spends each month on expenses such as salaries, rent, and other operating costs. A company with a long runway has more time to achieve profitability or secure additional funding, while a company with a short runway may need to take immediate action to conserve cash or raise additional capital.