I. | ̷ ̷ ̷ ̷| ̷ ̷ adjective
: being one more than 54 in number
fifty-five years
— see number table
II. pronoun, plural in construction
: 55 countable persons or things not specified but under consideration and being enumerated
fifty-five are here
fifty-five were found
III. noun
1. : five and 50 : five times 11 : 11 fives
2.
a. : 55 units or objects
a total of fifty-five
b. : a group or set of 55
3. : the numerable quantity symbolized by the arabic numerals 55
4. : the 55th in a set or series