Definitions
1.AdverbOn a working basis by which work done by one party is rewarded by benefits (especially board and lodging) rather than by monetary remuneration. .mw-parser-output .defdate{font-size:smaller}
2.NounAn au pair working arrangement (see Adverb).
3.NounA person (especially a young woman) working in such a way; now specifically, a foreign worker who helps a host family with childcare, housework, or both while staying as a guest with a host family, and generally receives a small allowance (or pocket money).