(intransitive) To reject or bar improvement because it is incomplete.

Alternative form of perfect is the enemy of good

(number theory, recreational mathematics) A magic square of order n containing the numbers 1 to n² and where each 2 × 2 subsquare sums to 2s, where s = n² + 1, and all pairs of integers distant n/2 along a (major) diagonal sum to s.

plural of most-perfect magic square