From Longman Dictionary of Contemporary Englisha word of warning/caution/advice/thanks etca word of warning/caution/advice/thanks etcsomething you say that warns someone, thanks them etc It’s a beautiful city, but a word of warning: street robberies are very common. He left without a word of apology. → word
Examples from the Corpus
a word of warning/caution/advice/thanks etc• And a word of advice just you be careful of that old goat, Moreton.• Take a word of advice, Mr Watt.• You won't mind a word of advice?• And a word of warning - when you arrive in Hye-on-Wye beware of the second-hand bookshops.• However, a word of caution is in order.• Now a word of warning about the stitch patterns in the pattern book.• But business advisors in the city have sounded a word of caution.• He would hand her a sheaf of uncounted bank notes, which she received without a word of thanks. 