au pair (ô pâr?)n. A young foreigner who provides childcare for a family in exchange for room and board, often a small stipend, and the opportunity to study.[French : au, at the + pair, equal.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.au pair (?? ?p??; French o p?r) n1. (Professions) a. a young foreigner, usually a girl, who undertakes housework in exchange for board and lodging, esp in order to learn the languageb. (as modifier): an au pair girl. 2. a young person who lives temporarily with a family abroad in exchange for a reciprocal arrangement with his or her own familyvb (intr) to work as an au pairadvas an au pair: she worked au pair in Greece. [C20: from French: on an equal footing]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014au pair (o? ?p??r) n. 1. a person, usu. a young foreign visitor, employed to care for children, do housework, etc., in exchange for room and board. adj. 2. pertaining to or employed under such an arrangement. [1965?70;