A more thorough explanation:

Definition: To agree or consent. In a judicial opinion, to agree with the judgment in the case, or the opinion of another judge, but often for different reasons or through a different line of reasoning. In a bicameral legislature, to accept an amendment passed by the other house. In civil law, to join with other claimants in presenting a demand against an insolvent estate.

• After much discussion, the board members finally concurred on the new policy.
• In the Supreme Court's decision, Justice Smith concurred with the majority opinion, but wrote a separate opinion explaining her reasoning.
• The Senate passed a bill with amendments, and now it's up to the House of Representatives to concur with the changes.
• Several creditors concurred in filing a claim against the bankrupt company's estate.

The examples illustrate different contexts in which the term "concur" can be used. In the first example, board members come to an agreement on a new policy. In the second example, a judge agrees with the majority opinion but provides a different explanation. In the third example, one house of a legislature accepts changes made by the other house. In the fourth example, creditors join together to make a claim against a bankrupt company's estate.