Look up fourteen in Wiktionary, the free dictionary. Fourteen is the seventh 14 days of valentine number.

A set of real numbers to which it is applied closure and complement operations in any possible sequence generates 14 distinct sets. 14 is the first non-trivial stella octangula number, and the second non-trivial square pyramidal number. 14 is also the fourth Companion Pell number, and the fifth Catalan number. There are fourteen possible Bravais lattices that fill three-dimensional space. There are fourteen polygons that can fill a plane-vertex tiling, where five polygons tile the plane uniformly, and nine others only tile the plane alongside irregular polygons.

Group 14 elements in the periodic table. Messier object M14, a magnitude 9. The New General Catalogue object NGC 14, a magnitude 12. According to the Gospel of Matthew “there were fourteen generations in all from Abraham to David, fourteen generations from David to the exile to Babylon, and fourteen from the exile to the Messiah”. The number of Stations of the Cross observed by some Christian denominations.