uncley adjective 1noun 1forms 3 adjective1 •Characteristic of an uncle; avuncularThose events were memorable but they were memories only, misted and vague as the uncley sort of God one heard stories about in Sunday School. — 1946 noun1 •Familiar or endearing form of unclePaint nursery, Write regularly in Baby's Book, let aunties and unclies know. — 2015 formsuncleys · more uncley · most uncley