There was a note of caution in her letter.
His speech struck just the right note.
The meeting ended on an optimistic note.send/write sb a note I'll send you a note about this but please do put it on your calendars.
note to sb The bank said in a note to investors that the operation would make strategic sense.
I got a note from the CEO congratulating me on the deal.
I made a note to review the matter in a month's time