midsummer/ˌmɪdˈsʌmə(r); `mɪd`sʌmɚ/ n[U]1 the middle of summer, around 21 June 仲夏（6月21日前後） [attrib 作定语]a ,midsummer('s) `day 仲夏日.2 (idm 习语) ,midsummer `madness very great madness or foolishness 极度的疯狂或愚蠢.
牛津英汉双解词典