a long piece of cloth with a message on it that is carried between two poles or hung in a public place to show support for something 横幅；旗幡 
A huge banner over the street said ‘Welcome home’. 街道上的一面巨大横幅上写着“欢迎回家”。 Protesters carried a banner reading ‘Save our Wildlife’. 抗议者打着 “救救我们的野生生物” 字样的横幅。 🔊🔊
Extra ExamplesBanners demanded the leader's resignation. 横幅上写着要求总统辞职。 The demonstrators carried banners bearing various slogans. 示威者打着写有各种标语的横幅。 They marched forward with banners waving in the wind. 他们前进，旗帜随风飘扬。 A banner strung across the road read, ‘Welcome home, boys!’ 一面横幅横跨马路，上面写 ：“欢迎回家，小伙子们！”
Oxford Collocations Dictionaryverb + banner- drape
- hang
- hang out
- …
- hang
- flutter
- fly
- …
- ad
- headline
- year
- …
Word OriginMiddle English: from Old French baniere, ultimately of Germanic origin and related to band ‘musical group’.