soon 
/ˈsu:n/ adverb
soon·er; soon·est /ˈsu:n/ adverb 1 a : at a time that is not long from now
▪ We will soon be making changes. ▪ I'll see you soon. ▪ The soonest I can get there is tomorrow. ▪ When is the soonest possible date of delivery? ▪ We'll find out the answer soon enough. [=we'll find out the answer soon] ▪ We need to fix this problem sooner rather than later. [=we need to fix this problem soon]
b : in a short time after something happens
▪ The audience soon realized that it wasn't a stunt. ▪ She found a job soon after graduation. ▪ Please give me a call as soon as you get there. [=give me a call immediately when you get there] ▪ I had no sooner walked through the door when the phone rang. = No sooner did I walk through the door than the phone rang. [=the phone rang immediately after I walked through the door] ▪ I told them we needed more copies. No sooner said than done. [=they immediately gave us more copies] 2 : in a quick way : quickly
▪ How soon can you finish the job? ▪ The sooner you finish your homework, the sooner you can go outside and play. ▪ I will let you know as soon as possible. ▪ I'll get there as soon as I can. ▪ The sooner [=more quickly] we get the pipe fixed, the better. = We need to get the pipe fixed, the sooner the better.
▪ We will soon be making changes. ▪ I'll see you soon. ▪ The soonest I can get there is tomorrow. ▪ When is the soonest possible date of delivery? ▪ We'll find out the answer soon enough. [=we'll find out the answer soon] ▪ We need to fix this problem sooner rather than later. [=we need to fix this problem soon]
b : in a short time after something happens
▪ The audience soon realized that it wasn't a stunt. ▪ She found a job soon after graduation. ▪ Please give me a call as soon as you get there. [=give me a call immediately when you get there] ▪ I had no sooner walked through the door when the phone rang. = No sooner did I walk through the door than the phone rang. [=the phone rang immediately after I walked through the door] ▪ I told them we needed more copies. No sooner said than done. [=they immediately gave us more copies]
▪ How soon can you finish the job? ▪ The sooner you finish your homework, the sooner you can go outside and play. ▪ I will let you know as soon as possible. ▪ I'll get there as soon as I can. ▪ The sooner [=more quickly] we get the pipe fixed, the better. = We need to get the pipe fixed, the sooner the better.
sooner or later
: at an unspecified time in the future : eventually
▪ Sooner or later, we'll have to tell her the truth. ▪ The bus should be here sooner or later.
▪ Sooner or later, we'll have to tell her the truth. ▪ The bus should be here sooner or later.
too soon
: before the time that is proper, preferred, or specified
▪ I spoke too soon. ▪ It's too soon to tell what will happen. ▪ The show was over all too soon. ▪ The plumber arrived, and not a moment too soon. [=the plumber arrived just in time; if the plumber had arrived later, it would have been too late]
▪ I spoke too soon. ▪ It's too soon to tell what will happen. ▪ The show was over all too soon. ▪ The plumber arrived, and not a moment too soon. [=the plumber arrived just in time; if the plumber had arrived later, it would have been too late]
would sooner or would just as soon
— used to indicate what you want or prefer to do, have, etc. ▪ He would sooner [=would rather] lose everything than admit that he was wrong. ▪ We asked him to come with us, but he said he'd just as soon stay home.
