发信号 fāxìnhào to signal Origin Definitions Defs Strokes Stroke Words Sentences Sents 发 發 fā verb to send out To send out; to issue; to distribute; to deliver (as in mail, letters, or faxes).信号 信號 xìnhào noun signal (prearranged sign) a prearranged sound, light, movement, or sign used to transmit information or instructions, such as a whistle or a flare