The term 'meet head-on' can be defined as facing a challenge or problem directly and without hesitation. This term can be broken down into three crossword solutions: FACE (4 letters), DEFY (4 letters), and OPPOSE (6 letters). FACE means to confront something, while DEFY implies to resist or challenge something, and OPPOSE means to confront or go against something. Together, these three words suggest that one should meet a challenge or problem head-on by confronting it, resisting it, and opposing it.