Discover the difference between OK vs. Okay . Learn clear definitions, examples, and key points to master vocabulary for writing, texting, and conversations. Concert events listed are based on the artist featured in the video you are watching, channels you have subscribed to, your past activity while signed in to YouTube, including artists you search ... Learn the origin, usage, and variations of the words "OK" and " Okay " in English. Find out how they differ in spelling, formality, emphasis, and cultural perception.