arch noun
ADJ. pointed, round, semi-circular | brick, iron, masonry, stone | monumental, triumphal | Gothic, Romanesque, etc. | proscenium, railway an old theatre with a proscenium arch Mean little houses clustered under the railway arches.
VERB + ARCH build, erect This huge triumphal arch was erected at the beginning of this century. | form, make The branches of the trees formed an arch over the bench.
PREP. beneath an/the ~, through an/the ~, under an/the ~ We rode under the arch.
You can also check other dicts: arch (English, 中文解释 ), wordnet sense, Collins Definition