I. thou 1 /θaʊ/ BrE AmE number spoken
a thousand or a thousandth:
They paid about sixty-nine thou for it.
II. thou 2 /ðaʊ/ BrE AmE pronoun old use
[ Language: Old English ; Origin: thu ]
a word meaning ‘you’, used as the subject of a sentence
⇨ ↑ holier-than-thou