The condition where the margins of a leaf (or leaflet) have small jagged projections; examples include the leaves of Hackberry A doubly serrated leaf has fine serrations that occur on the edges of larger serrations; an example is the leaf of American Elm A leaf (or leaflet) that has smooth margins is called "entire", such as in Pawpaw
A serrated object such as a knife or blade has a row of V-shaped points along the edge. Bread knives should have a serrated edge. having a sharp edge made of a row of connected points like teeth (past participle of serrare , from serra )
a single notch in a row of notches; "one of the serrations was broken off" a row of notches; "the pliers had serrations to improve the grip" the condition of being serrated; "the serrations of a city skyline