Home Help Word English Spanish French Russian German Italian Chinese (Trad.) Chinese (Simpl.) Portuguese Arabic Turkish Greek » Definition of " Arrowhead " in English English Dictionary Results Arrowhead The head of an arrow. n. Arrowhead An aquatic plant of the genus Sagittaria, esp. S. sagittifolia, -- named from the shape of the leaves. n. Arrowheaded Shaped like the head of an arrow; cuneiform. a.