OK is an informal spoken English word. It means: OK, that's acceptable. You can also agree, agree. OK can also be written as ok or o.k, with the same pronunciation. It is also the most famous English word in the world.
If everything is normal on the railway, it is said that everything is correct, that is, "completely normal." Because the sound of All is close to "O", and the correct sound of O is close to "K", for convenience, workers omit reading "OK" to express the same meaning. Later, the meaning of words has been constantly evolving, and now it not only refers to "good", "not bad" and "not bad", but also includes the meaning of agreeing with and acknowledging other people's opinions. It is also used for signing, expressing agreement and approval.
OK is the most popular word in the world:
The history of "OK" begins with the abbreviation tide of 1839. Modern short messages have prompted the birth of a large number of abbreviations, such as BTW (by the way) and LOL (laughing out loud), but they are not as cultural as OK.
In fact, the United Nations, which uses six languages, praises the word OK every day. Translators don't have to translate OK into the native language of diplomats, because everyone knows what it means.