予定 (yotei) means a schedule, plan, or a pre-arranged appointment. You use it to talk about things that are decided to happen at a specific time or date. For example, '今日の予定は何ですか？' (What is today's plan/schedule?). It's often used for activities or events.

「予定」は、あらかじめ決まっている計画や時刻です。例：「今日の予定」