Meaning of “offset” - Learner’s Dictionary

offset

verb [ T ] uk us /ˌɒfˈset/ (present participle offsetting, past tense and past participle offset)

If one thing offsets another thing, it has the opposite effect and so creates a more balanced situation:

[ often passive ] The costs have been offset by savings in other areas.

(Definition of “offset” from the Cambridge Learner’s Dictionary © Cambridge University Press)