The highest limit.

(mathematics) The greatest value of a set or other mathematical structure, especially the global maximum or a local maximum of a function.

(mathematical analysis) An upper bound of a set which is also an element of that set.

(statistics) The largest value of a batch or sample or the upper bound of a probability distribution.

(snooker) A 147 break; the highest possible break.

(colloquial, darts) A score of 180 with three darts.

(colloquial, cricket) A scoring shot for 6 runs.

To the highest degree.