n.1 (in full Brownie Guide) a member of the junior branch of the Guides.
2 (brownie) Cookery a a small square of rich, usu. chocolate, cake with nuts. b Austral. & NZ a sweet currant-bread.
3 (brownie) a benevolent elf said to haunt houses and do household work secretly.
Phrases and idioms:
Brownie point colloq. a notional credit for something done to please or win favour.