| THIRTY | • thirty num. The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30. • thirty n. (Slang) A rack of thirty beers. • THIRTY n. a number. |
| THIRTEEN | • thirteen num. The cardinal number occurring after twelve and before fourteen, represented in Roman numerals as XIII… • THIRTEEN n. a number, three and ten. |
| THIRTIES | • thirties n. Plural of thirty. • thirties n. A decade starting with the year xx30, most usually the decade from 1930 to 1939. • thirties n. The decade of one’s life from age 30 through age 39. |
| THIRTEENS | • thirteens n. Plural of thirteen. • THIRTEEN n. a number, three and ten. |
| THIRTIETH | • thirtieth adj. The ordinal form of the number thirty. • thirtieth n. The person or thing in the thirtieth position. • thirtieth n. One of thirty equal parts of a whole. |
| THIRTYISH | • thirtyish adj. (Informal) Approximately thirty. • thirtyish adj. (Informal) Of about thirty years of age. • THIRTYISH adj. about thirty (in age). |
| THIRTEENTH | • thirteenth adj. The ordinal form of the number thirteen. • thirteenth n. The person or thing in the thirteenth position. • thirteenth n. One of thirteen equal parts of a whole. |
| THIRTIETHS | • thirtieths n. Plural of thirtieth. • THIRTIETH n. one of thirty equal parts. |
| THIRTYFOLD | • thirtyfold adj. Thirty times as great, or as many. • thirtyfold adv. By a factor of thirty. • THIRTYFOLD adv. multiplied by thirty. |
| THIRTEENTHS | • thirteenths n. Plural of thirteenth. • THIRTEENTH n. a thirteenth part of. |
| THIRTEENTHLY | • thirteenthly adv. In the thirteenth place; thirteenth in a row. • THIRTEENTH adv. number thirteen in sequence. |
| THIRTYSOMETHING | • thirtysomething n. A tricenarian: a person in their thirties, a person aged between 30 and 39 years (inclusive). • thirtysomething adj. Between 30 and 39 years of age. • thirtysomething adj. Between 30 and 39 in number. |