1) Ordinal 
• (a.) Next in order after nine hundred and ninty-nine; coming last of a thousand successive individuals or units; -- the ordinal of thousand; as, the thousandth part of a thing. • (n.) The quotient of a unit divided by a thousand; one of a thousand equal parts into which a unit is divided. • (a.) Constituting, or being one of, a tho...
Thou'sandth adjective 1. Next in order after nine hundred and ninty-nine; coming last of a thousand successive individuals or units; -- the ordinal of thousand ; as, the thousandth part of a thing. 2. Constituting, or being one of, a thousand equal parts into which anythi...
[adj] - the ordinal number of one thousand in counting order 2. [n] - position 1,000 in a countable series of things
1000th adjective the ordinal number of one thousand in counting order