- 1[intransitive, transitive] (formal or specialist) 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) (specialist) when a substance, especially metal, fuses, or you fuse it, it is heated until it melts
- 3[intransitive, transitive] fuse (something) (British English) to stop working or to make something stop working because a fuse melts The lights have fused. I've fused the lights.
- 4[transitive, usually passive] fuse something to put a fuse in a circuit or in a piece of equipment Is this plug fused? Word Originverb late 16th cent.: from Latin fus-
BrE BrE//fjuːz//; NAmE NAmE//fjuːz//Verb Forms present simple I / you / we / they fuse
BrE BrE//fjuːz//; NAmE NAmE//fjuːz//he / she / it fuses
BrE BrE//ˈfjuːzɪz//; NAmE NAmE//ˈfjuːzɪz//past simple fused
BrE BrE//fjuːzd//; NAmE NAmE//fjuːzd//past participle fused
BrE BrE//fjuːzd//; NAmE NAmE//fjuːzd//-ing form fusing
BrE BrE//ˈfjuːzɪŋ//; NAmE NAmE//ˈfjuːzɪŋ//