adjective
- coming last in a series of a million.
- being one of a million equal parts.
noun
- the millionth member of a series.
- a millionth part, especially of one (1/1,000,000).
noun
-
- one of 1 000 000 approximately equal parts of something
- (as modifier)a millionth part
- one of 1 000 000 equal divisions of a particular scientific quantityRelated prefix: micro-
- the fraction equal to one divided by 1 000 000
adjective
- (usually prenominal)
- being the ordinal number of 1 000 000 in numbering or counting order, etc
- (as noun)the millionth to be manufactured
adj.1670s, from million + -th (1).