THIRTY

[determiner], [pronoun], [noun] - (the number) 30twenty-nine, thirty, thirty-oneI'm going to be thirty on my next birthday.I think there'll be about thirty (people) at the evening reception.Is that number a thirty or a fifty?(saying) 'Thirty days has September, April, June and November (all the rest have thirty-one, except for February which stands alone)' is used to help remember the number of days in each month of the year.