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The lowest amount, the least total, the smallest value, the smallest size, the most shallow .... The least of something. The opposite of maximum.

The smallest value of a function; the lowest point on a graph. Often we talk about a local minimum, i.e. the lowest point in a particular region of a graph.

A point where a function has its smallest value. For a function of one variable, a stationary point may be identified as a local minimum if the second derivative is positive at that point. For a function of more than one variable it is a stationary point where the slope of the function is positive in every direction.