I. | ̷ ̷ ̷ ̷| ̷ ̷ adjective
: being one more than 57 in number
fifty-eight years
— see number table
II. pronoun, plural in construction
: 58 countable persons or things not specified but under consideration and being enumerated
fifty-eight are here
fifty-eight were found
III. noun
1. : eight and 50 : 29 times two
2.
a. : 58 units or objects
a total of fifty-eight
b. : a group or set of 58
3. : the numerable quantity symbolized by the arabic numerals 58
4. : the 58th in a set or series