What does "derate" mean?

To lower the rated capability of any rated equipment or material.

What is a synonym for "derate"?

Common synonyms include: adjust downward, decrease, devalue, discount, limit, reduce.

/diːˈɹeɪt/ verb

verb ·Rare ·Advanced level

Verb

1
To lower the rated capability of any rated equipment or material.
"The derated engine sold at a lower price, but had the same components as the standard model."
2
lower the rated electrical capability of electrical apparatus wordnet

"The derated engine sold at a lower price, but had the same components as the standard model."

From de- + rate.