max‧i‧mum1 S2 W3 [only before noun]
the maximum amount, quantity, speed etc is the largest that is possible or allowed [≠ minimum]:
The car has a maximum speed of 120 mph.
They made maximum use of the resources available.
To get the maximum benefit, do the exercises slowly.
Display the hologram under a strong light for maximum effect.
The plant is operating at maximum capacity.
maximum amount/number etc
Work out the maximum amount you can afford to spend.
The award will consist of a lump sum to a maximum value of $5000.
maximum sentence/penalty/fine etc
She faces a maximum penalty of life in prison.