Translation

アイデア / 考え / 案 / 概念

Meaning

A thought or suggestion that comes to your mind. 'She had a great idea.' 'What a good idea!' Also: a general understanding or concept: 'I have no idea what happened.' Always countable: 'an idea', 'ideas'.

Examples

• 素晴らしいアイデアだ！
  That's a great idea!
• 何か良いアイデアがある？
  Do you have any ideas?