He didn't even button his coat.是什么意思？

He didn't even button his coat.

他没扣他外衣的纽扣。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

even

adv. 甚至，更加， 即使，恰巧在…时候；adj. 公平的，平坦的， 偶数的，平均的；vt. 使平坦，使相等；vi. 变平，成为相等；

例句
In his later life he became even more absent-minded.
他晚年变得愈加健忘了。

button

n. 按钮，电钮，纽扣，扣子，扣状物，[植]芽；vt. 用纽扣扣紧，用纽扣装饰，钉钮扣于，在…上装钮扣；vi. 扣住，装有钮扣，扣上钮扣；

例句
Burke pushed the button and the elevator began its slow ascent.
伯克按下按钮，电梯开始缓缓上升。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

coat

n. 上衣，外套；vt. 给…穿上上衣[外套]，盖上；

例句
...a coat with an astrakhan collar.
羔羊皮领大衣