[un.cle] n [ME, fr. OF, fr. L avunculus mother's brother; akin to OE eam uncle, W ewythr uncle, L avus grandfather] (14c) 1 a: the brother of one's father or mother b: the husband of one's aunt
2: one who helps, advises, or encourages 3--used as a cry of surrender "was forced to cry ~"
4. cap: uncle sam