I. | ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adjective
: being one more than 26 in number
twenty-seven years
— see number table
II. pronoun, plural in construction
: 27 countable persons or things not specified but under consideration and being enumerated
twenty-seven are here
twenty-seven were found
III. noun
1. : seven and 20 : three times nine : the cube of three
2.
a. : 27 units or objects
a total of twenty-seven
b. : a group or set of 27
3. : the numerable quantity symbolized by the arabic numerals 27
4. : the 27th in a set or series ; especially : an article of clothing of the 27th size
wears a twenty-seven