1 intr. hold a similar opinion (I agree with you about that; they agreed that it would rain).
2 intr. (often foll. by to, or to + infin.) consent (agreed to the arrangement; agreed to go).
3 intr. (often foll. by with) a become or be in harmony. b suit; be good for (caviar didn't agree with him). c Gram. have the same number, gender, case, or person as.
4 tr. reach agreement about (agreed a price).
5 tr. consent to or approve of (terms, a proposal, etc.).
6 tr. bring (things, esp. accounts) into harmony.
7 intr. (foll. by on) decide by mutual consent (agreed on a compromise).
Phrases and idioms:
agree to differ leave a difference of opinion etc. unresolved. be agreed have reached the same opinion.
Etymology: ME f. OF agreer ult. f. L gratus pleasing
Useful english dictionary. 2012.