The capital city of Vietnam. / (metonymically) the Vietnamese government.

(card games) A solitaire card game based on the Tower of Hanoi puzzle, starting with 3 columns of 3 cards, from A to 9. The object of the game is to build only one column with all the nine cards.

A puzzle in which stacks of disks are moved one at a time from one of three spindles to another so that no disk ever rests on a smaller disk.

A mathematical puzzle or game which consists of three rods, and a number of disks of different sizes that can slide onto any rod.

(US, military, slang, historical) Hỏa Lò Prison in Vietnam, where prisoners of war were held.