noun
one sun (approx. 3 cm)
Traditional Japanese unit of length, roughly 3.03 cm. Used in historical or traditional contexts.
See also: 寸
この柱は一寸ほど短い。
This pillar is about one sun too short.
noun, adverb
a little bit; a short time; a short distance
Figurative use derived from the small length unit. Often used adverbially to mean 'a little' or 'slightly'.
一寸待ってください。
Please wait a moment.
駅まで一寸歩く。
It's a short walk to the station.