| a. | 1. | The next in order after seventy-ninth. |
| 2. | Consisting of one of eighty equal parts or divisions. | |
| n. | 1. | The quotient of a unit divided by eighty; one of eighty equal parts. |
| Noun | 1. | eightieth - position 80 in a countable series of things |
| Adj. | 1. | eightieth - the ordinal number of eighty in counting order Synonyms: 80th |
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