Glossary Term Definition
The variation in stroke width within a letterform, reflecting the angle and pressure of the writing instrument; a key attribute in classifying typefaces.
Definition
The variation in stroke width within a letterform, reflecting the angle and pressure of the writing instrument. Modulation is a key attribute in classifying typefaces: humanist faces show natural pen-derived modulation, while geometric faces tend toward uniform, unmodulated strokes.
Source
No access — Robert Bringhurst — p. 327:
The variation in stroke width within a letterform.