twen•ty-five (twen′ tē fīv′, twun′ -), n. a cardinal number, 20 plus 5. a symbol for this number, as 25 or XXV. a set of this many persons or things. adj. amounting to 25 in number. 'twenty-five' also found in these entries (note: many are not synonyms or translations): classic car - gee - pachisi - two bits - two-bit. Yes, you put a hyphen between twenty and five: twenty-five. Does twenty five need a hyphen? As 25 is a compound number in between 21 and 99 it needs a hyphen; therefore writing 25 in full is twenty-five. Five past one: One-oh-five: 1:10: Ten past one: One-ten: 1:15: Quarter past one: One-fifteen: 1:20: Twenty past one: One-twenty: 1:25: Twenty-five past one: One-twenty-five: 1:30: Half past one: One-thirty: 1:35: Twenty-five-to-two: One-thirty-five: 1:40: Twenty-to-two: One-forty: 1:45: Quarter-to-two: One-forty-five: 1:50: Ten-to-two: One Noun 1. twenty-five - the cardinal number that is the sum of twenty-four and one 25, XXV large integer - an integer equal to or greater than ten Adj. 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 ). Five important natural thresholds already risk being crossed, according to the Global Tipping Points report, and three more may be reached in the 2030s if the world heats 1.5C (2.7F) above pre Xvh4.