n. 邮筒, 信筒
在线英汉词典

pillar-box的短语、例句：

pillar-box n (Brit) public post-box in the shape of a pillar about five feet high and painted bright red 邮筒, 信筒（柱形, 约五英尺高, 大红色）
[attrib 作定语] pillar-box red 邮筒的红色.