noun, slang ·Uncommon ·College level

Definitions

Noun

1. 1
   Having a head that is unusually tapered or small. informal, uncountable
2. 2
   Foolishness; ignorance. slang, uncountable

Etymology

From pinheaded + -ness.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.