- 1[transitive, intransitive] arch (something) if you arch part of your body, or if it arches, it moves and forms a curved shape The cat arched its back and hissed.
- 2[intransitive] to be in a curved line or shape across or over something Tall trees arched over the path. Word Originverb Middle English: from Old French arche, based on Latin arcus
BrE BrE//ɑːtʃ//; NAmE NAmE//ɑːrtʃ//Verb Forms present simple I / you / we / they arch
BrE BrE//ɑːtʃ//; NAmE NAmE//ɑːrtʃ//he / she / it arches
BrE BrE//ˈɑːtʃɪz//; NAmE NAmE//ˈɑːrtʃɪz//past simple arched
BrE BrE//ɑːtʃt//; NAmE NAmE//ɑːrtʃt//past participle arched
BrE BrE//ɑːtʃt//; NAmE NAmE//ɑːrtʃt//-ing form arching
BrE BrE//ˈɑːtʃɪŋ//; NAmE NAmE//ˈɑːrtʃɪŋ//