I. ˈ ̷ ̷ˌ ̷ ̷ noun
1.
a. : the head of a pin
b. : something very small or insignificant
2.
a. : a microcephalic idiot
b. : a very dull or stupid person : fool
seems an awful pinhead — Wolcott Gibbs
3. : a part of a plow containing pinholes for a pin the position of which regulates the depth of furrow
4. : a small minnow
II. ˈ ̷ ̷| ̷ ̷ adjective
: pinheaded
pinhead philosophy … and abysmal ignorance — James Kelly