The phrase "check out" can mean several things depending on the context. Primarily, it refers to the act of inspecting or examining something to understand its quality, accuracy, or value. It can also mean to leave a place, such as a hotel, after paying the bill. Additionally, in informal contexts, it can refer to looking at or paying attention to something interesting.
The term "check out" originates from the combination of the word "check," which comes from the Old French word "eschequier" (to check, to stop), and the word "out," which indicates a movement away from something. Together, they create a phrase that indicates a process of examination or action taken to confirm or leave.