Agreement or consent; to approve or give permission for a proposal or request.
会議でその計画に同意した。
I agreed to that plan at the meeting.
親の同意がなければ参加できない。
You can't participate without parental consent.
契約書に署名して、正式に同意を示した。
By signing the contract, they formally indicated their consent.
Having the same opinion or view; agreement in opinion.
その点については私も同意です。
I share the same view on that point.
専門家たちの間で評価は同意しているようだ。
It seems experts agree in their assessments.
チーム全員の同意を得て方針を決めた。
We decided the policy after getting the agreement of the whole team.
Having the same meaning (synonymous).
「終える」と「済ます」は文脈によって同意と見なせることがある。
Depending on context, '終える' and '済ます' can be regarded as having the same meaning.
この二つの表現は厳密には違うが、日常会話では同意に使われることが多い。
Strictly speaking the two expressions differ, but in everyday speech they are often used interchangeably.