Trans Am, short for Trans America, refers to a performance version of the Pontiac Firebird, which is an American muscle car. It became widely recognized and popularized through its appearance as the iconic car known as KITT (Knight Industries Two Thousand) in the television series "Knight Rider."
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: "Knight Rider" car. Explanations are generated by AI and may be inaccurate.