fifty-third adjective 1noun 1forms 1 adjective1 •The ordinal form of the number fifty-three, describing a person or thing in position number 53 of a sequence.The answer appears on the fifty-third page of the book.She finished fifty-third in the race. noun1 •One of fifty-three equal parts of a whole.A fifty-third of 1060 is 20. formsfifty-thirds
