A response used to reluctantly decline an invitation or politely answer a question in the negative, indicating regret that the answer is "no." When the phrase is abbreviated to "'fraid not," an apostrophe is sometimes used in place of the missing letter. A: "Will you be able to attend the meeting tomorrow?" B: "I'm afraid not. I'm going to be out of town."A: "Could you loan me a hundred bucks?" B: "'Fraid not. I'm broke."