Note/nəʊt/ Definition 1 of 7Pro Tip 1/3Brief Information Used for short, informal messages often in personal or casual settings. Check your desk, I left a note with the meeting details. Pro Tip 2/3Physical Reminder Commonly used for written reminders on paper, sticky notes, or napkins. She stuck a note on the mirror to remind herself to call her mom. Pro Tip 3/3Quick Communication A note can be a fast way to communicate without needing a conversation. I'll leave a note for the courier with instructions.