堡礁 bǎojiāo barrier reef Definitions Defs Origin Strokes Stroke Words Sentences Sents 堡 bǎo nounproper noun fortress (bound form) fort; fortress; castle; also used to transliterate names ending in -burg or -berg, or as an abbreviation for 汉堡 hànbǎo礁 jiāo noun biogenic reef (bound form) a rock-like structure formed by the skeletons of living organisms, such as coral reefs