The term "66th" refers to the ordinal number that comes after the 65th and before the 67th. It is commonly used to denote a position in a sequence, such as in rankings, events, or lists. For example, a person finishing in 66th place in a race has completed the event ahead of 67 others but behind 65 participants. In various contexts, "66th" can also refer to specific anniversaries or commemorations. For instance, the 66th anniversary of an event marks 66 years since it occurred, often celebrated with special activities or reflections on its significance.