nota bene /ˌnəʊtə ˈbɛneɪ/noun 3phrase 1 noun3 •(informal, rare) An instance of the phrase nota bene or its variant spellings. Also, by extension. •(informal, rare) Any indication similar in nature to nota bene. •(informal, rare) Something deserving of close attention or of careful notice. phrase1 •Take special note; used to add an aside or warning to a text.