D defs.my
Entry 4 senses · 2 variants Webster, 1913

Thousandth

/thouz'-əndth/ · Thou·sandth · IPA /ˈθaʊzən(d)θ/
01 a. Next in order after nine hundred and ninty-nine; coming last of a thousand successive individuals or units; -- the ordinal of thousand; as,…
  1. 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. 2.
    Constituting, or being one of, a thousand equal parts into which anything is divided; the tenth of a hundredth.
  3. 3.
    Occurring as being one of, or the last one of, a very great number; very small; minute; -- used hyperbolically; as, to do a thing for the thousandth time.
02 n. The quotient of a unit divided by a thousand; one of a thousand equal parts into which a unit is divided.
  1. 1.
    The quotient of a unit divided by a thousand; one of a thousand equal parts into which a unit is divided.