Meaning of “fuse” - Learner’s Dictionary

fuse

verb [ I, T ] uk us /fjuːz/
ELECTRICAL EQUIPMENT UK

If a piece of electrical equipment fuses, or if you fuse it, it stops working because there is too much electricity going through it:

You've fused the lights.
JOIN

to join or become combined:

The bones of the skull are not properly fused at birth.

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