1 SAME OPINION (intransitive, transitive not in progressive) to have the same opinion about something as someone else(+ with): Mr Larsen seems to think it's too risky and I agree with him. | agree: Teenagers and their parents rarely agree. (+ that): Most scientists agree that global warming is a serious problem. (+ on/about): They belong to the same party, but they don't agree on everything. | I quite agree BrE spoken (=I agree completely): "It's ridiculous." "Yes, I quite agree." | I couldn't agree more spoken (=I agree completely) -opposite disagree (1), -see refuse 12 DECIDE TOGETHER (intransitive, transitive not in progressive) to make a decision with someone after a discussion with them: agree to do sth: We agreed to meet up later and talk things over. | agree that: It was agreed that Mr. Rollins would sign the contract May 1st.(+ on): They managed to agree on a date for the wedding. (+ to): We voted to agree to the latest pay offer. | agree a price/plan/strategy etc: We agreed a price and the car was mine. | I think the committee will agree the changes soon.3 SAY YES (intransitive, transitive not in progessive) to say yes to an idea, plan, suggestion etc: I suggested we go somewhere for the weekend and she agreed at once. | agree to do sth: Why don't we agree right now to use recycled paper?4 BE THE SAME (intransitive not in progressive) if two pieces of information agree with each other, they are the same(+ with): Your story doesn't agree with what the police have told us.5 agree to differ to accept that you do not have the same opinions as someone else and agree not to argue about itUSAGE NOTE: AGREE GRAMMAR If you have the same opinion as someone else you agree with them. You can also agree with (=approve of) their attitude, ideas, plans, rules etc, or an activity or principle that you approve of: Do you agree with corporal punishment? You agree with people about or on other matters: I agree (with you) about Mark/on astrology/about this issue (NOT I agree this issue). If you and others decide on or arrange to do something after discussing it, you agree on it: We finally agreed on a plan/a date/a solution/a deal. More formally you could also say: We agreed a plan/a date/a solution/a deal. If you accept something, especially something that was not your idea and perhaps you do not like, you agree to it. She agreed to the plan/the date/the solution/the deal. (NOT She agreed the plan etc). You can also agree to do something: They agreed to wait (NOT They accepted to wait).
Longman dictionary of contemporary English. 2004.