min‧i‧mize also minimise British English [transitive]
to reduce something that is difficult, dangerous, or unpleasant to the smallest possible amount or degree [≠ maximize]:
Every effort is being made to minimize civilian casualties.
The rail company is bringing in more trains in an effort to minimize disruption to travellers.
to make something seem less serious or important than it really is [= play down]:
We must not minimize the problem of racial discrimination.
to make a document or program on your computer very small when you are not using it but still want to keep it open [≠ maximize]:
Click on the top of the window to minimize it.