The term 'talk big' can be defined by four crossword solutions: CROW (4 letters), BOAST (5 letters), BRAG (4 letters), and ORATE (5 letters). CROW is a verb meaning to make a loud, harsh sound, while BOAST is a verb meaning to speak with excessive pride and self-satisfaction about one's achievements, possessions, or abilities. BRAG is also a verb, meaning to talk with excessive pride and self-satisfaction about one's achievements, possessions, or abilities. Lastly, ORATE is a verb meaning to deliver a formal speech in a pompous or theatrical manner. Together, these words all describe the act of talking big, which is speaking in an overly confident and boastful manner.