noun
good idea; excellent plan
Refers to a clever, well-thought-out idea or solution. Often used when someone comes up with a particularly effective or ingenious plan.
それは名案だね!
That's a great idea!
何か名案はありませんか。
Does anyone have a good idea?
Compound of 名 (mei, 'famous, excellent') and 案 (an, 'plan, idea'). The combination straightforwardly yields 'excellent plan'.