- 1[intransitive, transitive] when one thing fuses with another, or two things fuse or are fused, they are joined together to form a single thing fuse (together) As they heal, the bones will fuse together. fuse (into something) Our different ideas fused into a plan. Their lips fused in a passionate kiss. fuse with something The sperm fuses with the egg to begin the process of fertilization. fuse something (into something) The two companies have been fused into a single organization. Atoms of hydrogen are fused to make helium.
- 2 [intransitive, transitive] fuse (something) (technology) when a substance, especially metal, fuses, or you fuse it, it is heated until it melts
- 3[transitive, usually passive] fuse (something) to put a fuse in a circuit or in a piece of equipment Is this plug fused?
NAmE//fyuz//Verb Forms present simple I / you / we / they fuse
he / she / it fuses
past simple fused
-ing form fusing