It corresponds to the word thing or individual;
in the phrases 這個 那個 別個 another, and a few application as a classifier, which is more extensive than that of any other one;
it is applied to periods of time, to portions of land, and to such things as are somewhat roundish or compact, as boxes; as well as to many other things made by men.
It is also used interchangeably with No.2 in denoting many things made by art.