四声 sìshēng four tones of Mandarin Definitions Defs Origin Strokes Stroke Words Sentences Sents sìshēng four tones of Mandarin · four tones of Middle Chinese 四 sì numeral four the number four; complex form used for financial purposes is 肆 sì声 聲 shēng tone (bound form) tone of a character or syllable; the musical pitch of a soundsìshēng fourth tone 四 sì numeral fourth the fourth in a sequence or rank声 聲 shēng tone (bound form) tone of a character or syllable; the musical pitch of a sound