mass noun
1- the action of going out of or leaving a place外出, 出：
direct means of access and egress for passengers.
供乘客出入的直接途径。
1.1
- count noun a way out出路, 出口：
a narrow egress.
一个狭窄的出口。
with obj.
- chiefly US go out of or leave (a place)〈主美〉从（某地）出去; 离开：
they'd egress the area by heading south-west.
他们将从西南方向离开该地区。
词源
mid 16th cent.: from Latin egressus 'gone out', from the verb egredi, from ex- 'out' + gradi 'to step'.