Glossary Term Definition
Upright, as opposed to italic or oblique; used to describe the posture of letterforms that stand vertical on the baseline.
Definition
Upright, as opposed to italic or oblique. Used to describe the posture of letterforms that stand vertical on the baseline. Roman type is orthotic; italic type is not. The term is used by Bringhurst as a more precise alternative to "upright" or "roman" when describing letterform posture independently of historical style.
Source
No access — Robert Bringhurst — p. 327:
Upright, as opposed to italic or oblique.