bigwig/ˈbɪɡ.wɪɡ/EtymologyFirst arose in the 1730s, from big + wig. Formerly, English men of authority wore wigs. Bigwig plays on the idea that higher authority is denoted by a larger wig.bigwig means A person of importance in a group or organization. Lexicurio rates it Sui generis — a strength score of 90 out of 100.nounA person of importance in a group or organization.“The company bigwig is gathering his staff together for a meeting today.”