Definition of thous:
(n) :
A unit of length equal to one thousandth of an inch (25.4 µm).
(n) :
(slang) A thousand, especially a thousand of some currency (dollars, pounds sterling, etc.).
(v) :
(transitive) To address (a person) using the pronoun thou, especially as an expression of contempt or familiarity.
(v) :
(intransitive) To use the word thou.
(adv) :
Misspelling of though. [(conjunctive) Despite that; however.]