Synonym of millennium: a period of 1000 years.
Synonym of chiliarchy: a group of 1000 soldiers commanded by a chiliarch.
A thousand, especially a thousand of some currency (dollars, pounds sterling, etc.).
A unit of length equal to one-thousandth of an inch (25.4 µm).
To use the word thou.
To address (a person) using the pronoun thou, especially as an expression of contempt or familiarity.