measure word · classifier for classes, lectures, or periods of instruction

我今天上午有三堂课。

noun, proper name, verb · main hall or a large room used for a specific purpose

他独自坐在正堂喝茶，等待客人的到来。

measure word · classifier for sets of furniture

这堂红木家具非常昂贵。

measure word · relationship between cousins on the paternal side or belonging to the same clan

由于他们两家有堂亲关系，所以长得很像。