tad I. \ˈtad\noun (-s) Etymology: probably from English dialect, toad, from Middle English tade, tadde, tode — more at toad : boy < film … that will give any tad his fill of action — John McCarten > II. noun : a small or insignificant amount or degree : bit < might give him some water and a tad to eat — C.T.Walker > • - a tad