Absolute Extrema
Absolute Maximum: The highest output-value of a function
Absolute Minimum: The lowest output-value of a function
Some nomenclature:
The plural of maximum is maximums or maxima
The plural of minimum is minimums or minima
The word that groups maxima and minimum together is "extrema." Connect this in your mind to maxima and minima being the extremes of the graph.
Sometimes we omit the word "absolute."
Sometimes we use the word "global" instead of "absolute"
"Find the maximum" = "Find the absolute maximum" = "Find the global maximum"