thousandth Meaning, Definition & Usage

  1. noun position 1,000 in a countable series of things
  2. noun one part in a thousand equal parts
    one-thousandth.
  3. adjective satellite the ordinal number of one thousand in counting order
    1000th.

WordNet

Thou"sandth adjective
Definitions
  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 anything is divided; the tenth of a hundredth.
  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.
Thou"sandth noun
Definitions
  1. The quotient of a unit divided by a thousand; one of a thousand equal parts into which a unit is divided.

Webster 1913