1 : to have the same opinion [no obj] ▪ We agreed about some things, but we disagreed about others. ▪ They agreed among themselves. ▪ She says that a change is needed, and I agree completely. ▪ I couldn't agree more. ▪ We can all agree on/about one thing: the current law needs to be changed. ▪ Some critics have called the movie a masterpiece, but not everyone agrees. ▪ The house is too big for one person, don't you agree? —often + with ▪ I agree with you. = I agree with what you say. [+ obj] ▪ I agree (that) the house is too big. ▪ We all agree (that) the law needs to be changed. ◊When people are agreed, they have the same opinion. ▪ We are all agreed that the law needs to be changed. [=we all agree that the law needs to be changed] ▪ Researchers are now agreed that the cause of the disease is genetic. ▪ “So we'll have to revise the schedule. Agreed?” [=are we agreed?] “Agreed.” [=yes, we are agreed] ◊When a person or thing is agreed to be something specified, people regard that person or thing as something specified. ▪ The movie is generally agreed to be a failure. [=most people think that the movie is a failure] ▪ She is widely agreed to be one of our best writers. ▪ Her first book is almost universally agreed to be her best.
2 : to say that you will do, accept, or allow something that is suggested or requested by another person [no obj] ▪ The reporter asked her for an interview, and she reluctantly agreed. [=she reluctantly said yes] —often + to ▪ He agreed to [=consented to] their proposal/plan. ▪ agree to a compromise ▪ She agreed to an interview. = She agreed to being interviewed. [+ obj] ▪ She asked if she could go with him, and he agreed that she could. —often followed by to + verb ▪ He agreed to accept their proposal. ▪ She reluctantly agreed to be interviewed. ▪ He readily agreed to do what they wanted him to do. ▪ They agreed not to oppose her nomination.
3 of two or more people or groups : to decide to accept something after discussing what should or might be done [no obj] —usually + on or upon ▪ The jurors were unable to agree on a verdict. [=to reach a verdict] ▪ agree on a plan ▪ They agreed on a fair division of the profits. ▪ The means of ending the dispute were finally agreed upon. ▪ They should accept the terms that were originally agreed upon. ▪ The price was agreed upon in advance. [+ obj] (Brit) ▪ The jurors were unable to agree a verdict. ▪ The means of ending the dispute were finally agreed. ◊The forms agreed, agreed-upon, and (less commonly) agreed-on are used as adjectives in both U.S. and British English. ▪ She paid him the agreed price. ▪ They met at the agreed-upon time.
4 [no obj] : to be alike : to resemble or match each other ▪ The accounts of the accident did not agree (with each other). ▪ The copies agree exactly with the originals. ▪ These results agree with earlier studies.
5 [no obj] grammar : to be alike in gender, number, case, or person ▪ A verb should agree with its subject. ▪ A verb and pronoun should agree in number.
6 [no obj] : to be suitable for or pleasing to someone —+ with ▪ The climate agrees with you. [=the climate suits you] ▪ Spicy food doesn't agree with me. [=spicy food makes me feel unwell]