What does "fingerbreadth" mean?

A (usually approximate and informal) unit of measurement based upon the radial width of the human finger.

What is a synonym for "fingerbreadth"?

Common synonyms include: digit, finger, finger's breadth, portuguese dedo.

noun

noun ·Rare ·Advanced level

Noun

1
A (usually approximate and informal) unit of measurement based upon the radial width of the human finger.
2
the length of breadth of a finger used as a linear measure wordnet

From finger + breadth. Compare Middle English fynger brede, fyngerbrede, fyngyrbrede.