no·ta be·ne (n??t? b?n??, b??n?) Abbr. NB Used to direct attention to something particularly important.[Latin not? bene, note well : not?, sing. imperative of not?re, to note + bene, well.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.nota bene (?n??t? ?bi?n?) note well; take note. Abbreviation: NB, N.B., nb or n.b. Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014no?ta be?ne (?no? t? ?b? n?; Eng. ?no? t? ?b?n i, ?bi ni) Latin. note well. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.nota beneA Latin phrase meaning note well, the full form of the abbreviation n.b., used to draw attention to something important .Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited