Option spreads
When talking about options, "spread" has a different meaning entirely. A spread is a type of options trade that involves purchasing one option and selling another of the same stock. There are a few main types of spreads: vertical spreads involve buying and selling options with different strike prices, calendar spreads (also known as horizontal spreads) involve options with different expiration dates, and diagonal spreads involve both different strike prices and expiration dates.
For example, suppose a certain stock is trading for $50. And, let's say that its $45 call options expiring in a certain month are trading for $6.00 per share, while the $50 call options with the same expiration date are trading for $3.50.