English definition of “soon”
› after a short period of time: I've got to leave quite soon. It's too soon to make a decision. He joined the company soon after leaving college.
as soon as › at the same time or a very short time after: As soon as I saw her, I knew there was something wrong. They want it as soon as possible.
sooner or later › used to say that you do not know exactly when something will happen, but you are sure that it will happen: Sooner or later they'll realize that it's not going to work.
would sooner › would prefer: I'd sooner spend a bit more money than take chances with safety.
no sooner ... than › used to show that something happens immediately after something else: No sooner had we got home than the phone rang.