Definition from Wiktionary, the free dictionary
- (nonstandard) Which ordinal number.
Thanksgiving is on the whath of November this year?
1884, Eldredge & Brother, Selections from the Satires of Juvenal: To which is Added the Fifth Satire of Persius, page 144:
- Macleane explains himself very well when he says that “Whath part?” would express quota pars, if we could coin an interrogative adjective after the analogy of the seventh part, eighth, etc.
Although easily understood, this construction is rarely used even in informal speech.