red ensign

noun

1. 英国商船旗（左上角有英国国旗的红色旗帜）
   a red flag with a Union Jack in the corner, flown by ships that have been registered in Britain

1. There is also a red ensign, with this cross in the fly.
   还有一个红色的旗，这就是两岸在飞。
2. The red ensign flown directly above the blue ensign with Hong Kong armorial bearings.
   在有香港徽号的英国蓝色旗之上悬挂红色的英国商船旗。