"maximum" in the noun sense
1. maximum, upper limit
the largest possible quantity
2. utmost, uttermost, maximum, level best
the greatest possible degree
"he tried his utmost"
3. maximum
the point on a curve where the tangent changes from positive on the left to negative on the right
"maximum" in the adjective sense
1. maximal, maximum
the greatest or most complete or best possible
"maximal expansion"
"maximum pressure"
Source: WordNet® (An amazing lexical database of English)
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