The ordinal numeral corresponding to the cardinal numeral three, adj. n.; the last of three; that comes next after the second. with noun expressed.

Rarely used for the ordinal third, adj. n. Obsolete.

Third in order. Obsolete.

Of, in, or belonging to the third order, rank, degree, class, or category; third.

Last of each successive group of three; third.

Third (of each group of three); = ternary, adj. 3.