PEEKABOO Meaning of PEEKABOO in English adj. & n. --adj. 1. (of a garment etc.) transparent or having a pattern of small holes. 2 (of a hairstyle) concealing one eye with a fringe or wave. --n. US BO-PEEP. Etymology: PEEK + BOO Oxford English vocab. Оксфордский английский словарь. 2012