the head of a pin something very small a person lacking intelligence
WordReference Random House Learner's Dictionary of American English © 2026
pin•head /ˈpɪnˌhɛd/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- the head of a pin.
- Slang Termsa stupid person;
nitwit.
pin•head
(pin′hed′),USA pronunciation n.
- the head of a pin.
- something very small or insignificant.
- Slang Termsa stupid person;
nitwit.
- pin + head 1655–65
Collins Concise English Dictionary © HarperCollins Publishers::
'pinhead' also found in these entries (note: many are not synonyms or translations):