名詞 midweek:

1. the fourth day of the week; the third working day
   同義詞：Wednesday, Wed
2. the middle of a week

形容詞 midweek:

1. occurring during the middle of the week
   同義詞：midweekly

副詞 midweek:

1. in the middle of the week

1. Midweek is a good time to travel to avoid the crowd.
   星期三是避開(kāi)人群去旅行的最佳時(shí)間。
2. Midweek is a good time to travel to avoid the crowds.
   星期三是避開(kāi)人群去旅行的最佳時(shí)間。

mid.week

n.（名詞）
The middle of the week.
周中：一個(gè)星期的中段
Midweek Wednesday.
Midweek 星期三
n.attributive.（定語(yǔ)名詞）
Often used to modify another noun:
周中的：常用于修飾另一名詞：
例句：
a midweek appointment; midweek travel.
周中的約會(huì)；周中的旅行

【引伸】
mid.week.ly
adj.（形容詞）
adv.（副詞）