/jes/ adverb spoken
1 used as an answer to say that something is true, that you agree, that you want something, or that you are willing to do something: “Is that real gold?” “Yes, it is.” | “It was a great film.” “Yes, it was.” | “Would you like a sandwich?” “Yes, please.” | “Can you help us on Saturday?” “Yes I think so.”—opposite no2 used as an answer to give permission: “Can I have a glass of water?” “Yes, of course.” | say yes to (doing) sth: I hope my parents will say yes to the party.3 used to politely show that you do not agree with all or some of what someone has said: yes but: “We need a new car.” “Yes, but where will we get the money?”4 used to show that you have heard a request, call, command etc: “Can you close the door, please?” “Yes, in a minute.” | “Michael!” “Yes?”5 used to ask someone what they want: Yes? Can I help you find something, madam?6 yes, yes used to show annoyance when someone is talking to you and you do not want to listen: “And don't forget to lock the door!” “Yes, yes ok.”7 yes and no used to show that there is not one clear answer to a question: “Did you have a good time?” “Well, yes and no. The lake was beautiful, but Craig and Jen fought the whole time.”8 yes/no question a question to which you only answer yes or no—see also: yeah 2 noun (C) a vote, voter, or reply that agrees with an idea, plan, law etc: five yeses and three nos — yes adjective: a yes vote
Longman dictionary of contemporary English. 2004.