(dated) A coin worth thirteenpence. / (US, climbing) A mountain rising to more than 13,000 feet above mean sea level. / (dated, sometimes capitalized) A member of the 13th Gen; a Gen-Xer.

plural of thirteener

(rare) The property of being thirteen.

The cardinal number occurring after twelve and before fourteen, represented in Roman numerals as XIII and in Arabic numerals as 13.

plural of thirteen

The start of the fourteenth hour of the day on the 24-hour clock i.e. 13:00. / The number one thousand three hundred. / The year 1300.

(historical) The thirteen British colonies that successfully revolted in 1775--1781, forming the nucleus of the United States of America. To wit: New Hampshire, Massachusetts (including present-day Maine), Rhode Island, Connecticut, New York (including present-day Vermont), New Jersey, Pennsylvania, Maryland, Delaware, Virginia (including present-day West Virginia), North Carolina, South Carolina, and Georgia.

(slang) Synonym of bat mitzvah

plural of sweet thirteen

(Canada, historical) Thirteenth grade.