Used narrowly to refer specifically to the Zhouwen script style from the late Western Zhou dynasty.

狭义的大篆是指《史籀篇》中所记载的籀文。

noun · Used broadly to refer to various ancient Chinese calligraphic styles and scripts used before the standardization of the Small Seal script in the Qin dynasty.

广义的大篆包括了甲骨文、金文等多种先秦古文字。