TWENTY-FIFTH Definition & Usage Examples | Dictionary.com. twenty-fifth. [ twen-tee- fifth, twuhn- ] show ipa. adjective. next after the twenty-fourth; being the ordinal number for 25. being one of 25 equal parts. noun. a twenty-fifth part, especially of one (1/25). the twenty-fifth member of a series. Recommended videos. Powered by AnyClip.
Always hyphenate the numbers 21 to 99 when writing them out as words: I have twenty-one pairs of novelty socks. My grandma is sixty-seven years old. I have ninety-nine problems, but none involve a female dog. Do the same when writing an ordinal version of one of these numbers: My forty-first birthday was the best day ever.
The Chicago Manual of Style recommends spelling out the numbers zero through one hundred and using figures thereafter—except for whole numbers used in combination with hundred, thousand, hundred thousand, million, billion, and beyond (e.g., two hundred; twenty-eight thousand; three hundred thousand; one million ).