1
- a person who shows people to their seats, especially in a theatre or cinema or at a wedding（尤指剧院、影院或婚礼的）引座员。
1.1
- an official in a law court whose duties include swearing in jurors and witnesses and keeping order法庭庭警, 法警。
1.2
- Brit. a person employed to walk before a person of high rank on special occasions〈英〉领宾员。
2
- archaic an assistant teacher〈古〉助教。
with obj. and adverbial of direction
1- show or guide (someone) somewhere引, 领：
a waiter ushered me to a table.
侍者把我引到一张桌子前。
1.1
- figurative cause or mark the start of (something new)〈喻〉使开始, 开创：
the railways ushered in an era of cheap mass travel.
铁路开创了廉价的大众旅行时代。
词源
late Middle English (denoting a doorkeeper)： from Anglo-Norman French usser, from medieval Latin ustiarius, from Latin ostiarius, from ostium 'door'.