柯林斯詞典dial tone (dial tones) 1. N-COUNT The dial tone is the same as the . 同dialing tone[美國(guó)英語(yǔ)] 返回 dial tone劍橋詞典a continuous sound that tells you that a phone is connected to the phone system and is ready to be used （電話）撥號(hào)音 返回 dial tone